Skithiryx, the Blight Dragon — ruling 1

Skithiryx can regenerate even if it isn't in combat, it's already tapped, or it's undamaged.

Skithiryx, the Blight Dragon — ruling 2

Damage that a creature with infect deals doesn't result in damage being marked on a creature or a player losing life. Instead, it results in that many -1/-1 counters being put on that creature or that many poison counters being given to that player. Damage dealt to planeswalkers still results in that planeswalker losing that many loyalty counters. Damage dealt to battles still results in that battle losing that many defense counters.

Skithiryx, the Blight Dragon — ruling 3

A player who has ten or more poison counters loses the game. This is a state-based action.

Skithiryx, the Blight Dragon — ruling 4

The -1/-1 counters remain on the creature indefinitely. They're not removed if the creature regenerates or the turn ends.

Skithiryx, the Blight Dragon — ruling 5

Damage from a source with infect is damage in all respects. If the source with infect also has lifelink, damage dealt by that source also causes its controller to gain that much life. Damage from a source with infect can be prevented or redirected. Abilities that trigger on damage being dealt will trigger if a source with infect deals damage, if appropriate.

Skithiryx, the Blight Dragon — ruling 6

Activating the regeneration ability creates a replacement effect that acts like a shield, replacing the next time Skithiryx would be destroyed that turn. The shield works against effects that try to destroy Skithiryx or lethal damage that would be dealt to Skithiryx.

Skithiryx, the Blight Dragon — ruling 7

If the regeneration shield is used, Skithiryx isn't destroyed, all damage marked on Skithiryx is healed, it becomes tapped, and it's removed from combat (if applicable).

Skithiryx, the Blight Dragon : règles, fonctionnement et interactions (MTG)

Skithiryx, the Blight Dragon 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.

Official card text

Flying Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) : Skithiryx gains haste until end of turn. : Regenerate Skithiryx.

Complete guide

Skithiryx, the Blight Dragon, known affectionately as 'Skittles,' is one of the most feared commanders in Magic: The Gathering. This legendary Phyrexian Dragon Skeleton combines high power, evasion, and the deadly Infect mechanic to end games in a single strike. Understanding how to manage its haste and regeneration abilities is key to dominating the battlefield.

What It Does

Skithiryx is a 4/4 flyer with Infect, meaning it deals damage to creatures as -1/-1 counters and to players as poison counters. A player with ten poison counters loses the game immediately. Beyond its offensive stats, it features two activated abilities: one black mana gives it haste, and two black mana provides a regeneration shield to protect it from destruction.

How It Resolves Step by Step

When you activate the regeneration ability for {B}{B}, it creates a 'shield' that lasts until the end of the turn. If Skithiryx would be destroyed by lethal damage or a 'destroy' effect, the shield is consumed. Instead of being put into the graveyard, Skithiryx remains on the battlefield, all damage is removed from it, it becomes tapped, and it is removed from combat. Note that -1/-1 counters are not damage and cannot be removed by regeneration.

Common Mistakes

A frequent error is trying to regenerate Skithiryx after it has already been put into the graveyard; the ability must be activated before the destruction event occurs. Additionally, remember that while Skithiryx deals damage in the form of counters, it is still considered damage. Effects that prevent damage will prevent the application of poison or -1/-1 counters.

When to Play It

Skithiryx is best played when you have mana open to immediately grant it haste and potentially protect it. Because it only requires ten poison counters to win, it is a primary target for removal. Holding up {B}{B} for regeneration ensures that your investment stays on the board to finish the job.

Interaction examples

Infect vs. Traditional Creatures

Solemn Simulacrum

If Skithiryx attacks and is blocked by Solemn Simulacrum, Skithiryx deals four damage in the form of four -1/-1 counters. Because Solemn Simulacrum is a 2/2, it now has a toughness of -2 and dies. Since the death was caused by having zero or less toughness rather than 'destruction', regeneration would not save a creature in this specific scenario.

Winning with Poison

Poison Counter

When Skithiryx deals unblocked combat damage to a player, that player receives four Poison Counters. If that player reaches a total of ten Poison Counters, they lose the game immediately as a state-based action, regardless of their remaining life total.

Type Synergy and Triggers

Roaming Throne

If you control Roaming Throne and chose 'Dragon' or 'Skeleton,' it is important to note that Skithiryx's abilities are activated, not triggered. Roaming Throne will not double the Haste or Regeneration effects, as those do not start with 'When,' 'Whenever,' or 'At.'

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

How it works : Skithiryx, the Blight Dragon

Original English text — Wizards of the Coast / Scryfall

#1September 19, 2025· Wizards of the Coast
Skithiryx can regenerate even if it isn't in combat, it's already tapped, or it's undamaged.
No other card is named in this ruling.
#2September 19, 2025· Wizards of the Coast
Damage that a creature with infect deals doesn't result in damage being marked on a creature or a player losing life. Instead, it results in that many -1/-1 counters being put on that creature or that many poison counters being given to that player. Damage dealt to planeswalkers still results in that planeswalker losing that many loyalty counters. Damage dealt to battles still results in that battle losing that many defense counters.
Card named in this ruling
Poison Counter
#3September 19, 2025· Wizards of the Coast
A player who has ten or more poison counters loses the game. This is a state-based action.
Card named in this ruling
Poison Counter
#4September 19, 2025· Wizards of the Coast
The -1/-1 counters remain on the creature indefinitely. They're not removed if the creature regenerates or the turn ends.
No other card is named in this ruling.
#5September 19, 2025· Wizards of the Coast
Damage from a source with infect is damage in all respects. If the source with infect also has lifelink, damage dealt by that source also causes its controller to gain that much life. Damage from a source with infect can be prevented or redirected. Abilities that trigger on damage being dealt will trigger if a source with infect deals damage, if appropriate.
No other card is named in this ruling.
#6September 19, 2025· Wizards of the Coast
Activating the regeneration ability creates a replacement effect that acts like a shield, replacing the next time Skithiryx would be destroyed that turn. The shield works against effects that try to destroy Skithiryx or lethal damage that would be dealt to Skithiryx.
No other card is named in this ruling.
#7September 19, 2025· Wizards of the Coast
If the regeneration shield is used, Skithiryx isn't destroyed, all damage marked on Skithiryx is healed, it becomes tapped, and it's removed from combat (if applicable).
No other card is named in this ruling.