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Rules guide · Legendary Creature

Klauth, Unrivaled AncientHow it works & interactions with other cards

By the ManaCount desk· 6 min read· Forgotten Realms Commander· July 23, 2021
Carte Magic Klauth, Unrivaled Ancient

Klauth, Unrivaled Ancient is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

01

Official card text

Flying, haste Whenever Klauth attacks, add X mana in any combination of colors, where X is the total power of attacking creatures. Spend this mana only to cast spells. Until end of turn, you don't lose this mana as steps and phases end.

Complete guide

Klauth, Unrivaled Ancient is a powerhouse from the Dungeons & Dragons: Adventures in the Forgotten Realms Commander set that turns your aggression into fuel. This massive Dragon allows you to translate the physical might of your army directly into a mountain of mana, letting you follow up your combat phase with devastating spells.

Unrivaled Mana Generation

Klauth features a triggered ability that goes on the stack whenever it attacks. It calculates the total power of all creatures you have declared as attackers at the moment the ability resolves. Because the ability checks power upon resolution, any effects that buff your creatures—or any removal spells that take them off the board—will change the amount of mana you receive.

Timing and Restrictions

The mana generated by Klauth has two unique properties. First, you can only spend it to cast spells, meaning you cannot use it for activated abilities like Equip or Firebreathing. Second, this mana persists across steps and phases until the end of the turn. This is crucial because it allows you to carry the mana from the Declare Attackers step through your Combat Damage step and into your Second Main Phase.

It's Not a Mana Ability

A common mistake is assuming Klauth's ability cannot be responded to. Because it triggers on an event (attacking) rather than being an activated ability, it is not a 'mana ability' by Magic rules. It uses the stack, and opponents can cast spells in response. If they destroy one of your attacking creatures before the ability resolves, that creature's power will not be counted toward your total X.

Interaction examples

Boosting the Bounty
Craterhoof BehemothCraterhoof Behemoth

If Craterhoof Behemoth enters the battlefield and you attack with both it and Klauth, the Behemoth's triggered ability will significantly increase the power of both creatures. When Klauth's attack trigger resolves, it will count their new, massive power values, potentially giving you dozens of mana to spend on further spells.

Stacking Attack Triggers
Etali, Primal StormEtali, Primal Storm

When you attack with both Klauth and Etali, Primal Storm, two triggers are put on the stack. You can choose to let Klauth's ability resolve first to gain mana, or let Etali's resolve first to exile and cast free spells. Note that if you cast spells via Etali that buff your creatures' power before Klauth's ability resolves, Klauth will generate even more mana.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Klauth, Unrivaled Ancient

Original English text — Wizards of the Coast / Scryfall

  1. #1· Wizards of the Coast

    Despite that fact that it can produce mana as it resolves, Klauth's triggered ability is not a mana ability because its trigger condition wasn't the activation or resolution of an activated mana ability. This means that it uses the stack and can be responded to. Notably, players can respond by destroying attacking creatures to reduce the amount of mana produced.

    No other card is named in this ruling.

02

Popular combos

Real combos played by the community, sorted by popularity.

Fable of the Mirror-Breaker // Reflection of Kiki-Jiki
+Combat Celebrant
+Klauth, Unrivaled Ancient
#1

Fable of the Mirror-Breaker // Reflection of Kiki-Jiki + Combat Celebrant + Klauth, Unrivaled Ancient

Infinite colored manaInfinite combat phasesInfinite creature ETBInfinite creature LTB
  1. 1Activate Reflection of KIki-Jiki by paying {1} and tapping it, creating a token copy of Combat Celebrant with haste.
  2. 2Declare Klauth and Combat Celebrant token as attackers, choosing to exert Combat Celebrant as it attacks.
  3. 3When you attack, Klauth and the Combat Celebrant token trigger.
  4. 4Resolve the token's trigger, untapping all other creatures you control and causing you to get an additional combat phase after this one.
  5. 5Resolve Klauth's trigger, adding mana.
  6. 6Repeat.
Charnelhoard Wurm
+Klauth, Unrivaled Ancient
+Relentless Assault
#2

Charnelhoard Wurm + Klauth, Unrivaled Ancient + Relentless Assault

Infinite colored mana that can only be spent to cast spellsInfinite combat damageInfinite combat phasesInfinite magecraft triggers
  1. 1Declare Charnelhoard Wurm and Klauth as attackers.
  2. 2Klauth triggers, adding at least {8}{R}{R} that can only be spent to cast spells.
  3. 3Deal combat damage to an opponent using Charnelhoard Wurm.
  4. 4Charnelhoard Wurm triggers, returning Relentless Assault from your graveyard to your hand.
  5. 5Cast Relentless Assault by paying {2}{R}{R}, causing you to untap all creatures that attacked this turn and to get an additional combat and main phase after this one.
  6. 6Repeat.
Soul of Windgrace
+Waves of Aggression
+Klauth, Unrivaled Ancient
+Simic Growth Chamber
#3

Soul of Windgrace + Waves of Aggression + Klauth, Unrivaled Ancient + Simic Growth Chamber

Infinite combat phasesInfinite landfall triggersInfinite magecraft triggersInfinite self-discard triggers
  1. 1Declare Klauth and Soul of Windgrace as attackers.
  2. 2When they attack, Klauth and Soul of Windgrace trigger.
  3. 3Resolve the Klauth trigger, adding at least nine mana that you will not lose this turn as steps and phases end.
  4. 4Resolve the Soul of Windgrace trigger, returning Simic Growth Chamber from your graveyard to the battlefield tapped.
  5. 5When Simic Growth Chamber enters, it triggers, returning itself from the battlefield to your hand.
  6. 6In your next main phase, cast Waves of Aggression from your graveyard for its retrace cost by paying {3}{R/W}{R/W} and discarding Simic Growth Chamber, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one.
  7. 7Repeat.
Soul of Windgrace
+Waves of Aggression
+Klauth, Unrivaled Ancient
+Dimir Aqueduct
#4

Soul of Windgrace + Waves of Aggression + Klauth, Unrivaled Ancient + Dimir Aqueduct

Infinite combat phasesInfinite landfall triggersInfinite magecraft triggersInfinite self-discard triggers
  1. 1Declare Klauth and Soul of Windgrace as attackers.
  2. 2When they attack, Klauth and Soul of Windgrace trigger.
  3. 3Resolve the Klauth trigger, adding at least nine mana that you will not lose this turn as steps and phases end.
  4. 4Resolve the Soul of Windgrace trigger, returning Dimir Aqueduct from your graveyard to the battlefield tapped.
  5. 5When Dimir Aqueduct enters, it triggers, returning itself from the battlefield to your hand.
  6. 6In your next main phase, cast Waves of Aggression from your graveyard for its retrace cost by paying {3}{R/W}{R/W} and discarding Dimir Aqueduct, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one.
  7. 7Repeat.
Soul of Windgrace
+Waves of Aggression
+Klauth, Unrivaled Ancient
+Rakdos Carnarium
#5

Soul of Windgrace + Waves of Aggression + Klauth, Unrivaled Ancient + Rakdos Carnarium

Infinite combat phasesInfinite landfall triggersInfinite magecraft triggersInfinite self-discard triggers
  1. 1Declare Klauth and Soul of Windgrace as attackers.
  2. 2When they attack, Klauth and Soul of Windgrace trigger.
  3. 3Resolve the Klauth trigger, adding at least nine mana that you will not lose this turn as steps and phases end.
  4. 4Resolve the Soul of Windgrace trigger, returning Rakdos Carnarium from your graveyard to the battlefield tapped.
  5. 5When Rakdos Carnarium enters, it triggers, returning itself from the battlefield to your hand.
  6. 6In your next main phase, cast Waves of Aggression from your graveyard for its retrace cost by paying {3}{R/W}{R/W} and discarding Rakdos Carnarium, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one.
  7. 7Repeat.
Soul of Windgrace
+Waves of Aggression
+Klauth, Unrivaled Ancient
+Izzet Boilerworks
#6

Soul of Windgrace + Waves of Aggression + Klauth, Unrivaled Ancient + Izzet Boilerworks

Infinite combat phasesInfinite landfall triggersInfinite magecraft triggersInfinite self-discard triggers
  1. 1Declare Klauth and Soul of Windgrace as attackers.
  2. 2When they attack, Klauth and Soul of Windgrace trigger.
  3. 3Resolve the Klauth trigger, adding at least nine mana that you will not lose this turn as steps and phases end.
  4. 4Resolve the Soul of Windgrace trigger, returning Izzet Boilerworks from your graveyard to the battlefield tapped.
  5. 5When Izzet Boilerworks enters, it triggers, returning itself from the battlefield to your hand.
  6. 6In your next main phase, cast Waves of Aggression from your graveyard for its retrace cost by paying {3}{R/W}{R/W} and discarding Izzet Boilerworks, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one.
  7. 7Repeat.
Soul of Windgrace
+Waves of Aggression
+Klauth, Unrivaled Ancient
+Oboro, Palace in the Clouds
#7

Soul of Windgrace + Waves of Aggression + Klauth, Unrivaled Ancient + Oboro, Palace in the Clouds

Infinite combat phasesInfinite landfall triggersInfinite magecraft triggersInfinite self-discard triggers
  1. 1Declare Klauth and Soul of Windgrace as attackers.
  2. 2When they attack, Klauth and Soul of Windgrace trigger.
  3. 3Resolve the Klauth trigger, adding at least nine mana that you will not lose this turn as steps and phases end.
  4. 4Resolve the Soul of Windgrace trigger, returning Oboro, Palace in the Clouds from your graveyard to the battlefield tapped.
  5. 5Activate the last ability of Oboro, Palace in the Clouds by paying {1}, returning it from the battlefield to your hand.
  6. 6In your next main phase, cast Waves of Aggression from your graveyard for its retrace cost by paying {3}{R/W}{R/W} and discarding Oboro, Palace in the Clouds, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one.
  7. 7Repeat.
Soul of Windgrace
+Waves of Aggression
+Klauth, Unrivaled Ancient
+Boros Garrison
#8

Soul of Windgrace + Waves of Aggression + Klauth, Unrivaled Ancient + Boros Garrison

Infinite combat phasesInfinite landfall triggersInfinite magecraft triggersInfinite self-discard triggers
  1. 1Declare Klauth and Soul of Windgrace as attackers.
  2. 2When they attack, Klauth and Soul of Windgrace trigger.
  3. 3Resolve the Klauth trigger, adding at least nine mana that you will not lose this turn as steps and phases end.
  4. 4Resolve the Soul of Windgrace trigger, returning Boros Garrison from your graveyard to the battlefield tapped.
  5. 5When Boros Garrison enters, it triggers, returning itself from the battlefield to your hand.
  6. 6In your next main phase, cast Waves of Aggression from your graveyard for its retrace cost by paying {3}{R/W}{R/W} and discarding Boros Garrison, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one.
  7. 7Repeat.
03

Legal formats

legacyvintagecommanderoathbreakerduel
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Meta decks with Klauth, Unrivaled Ancient

No archived Top 8 deck with this card yet.

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