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Undercover OperativeHow it works & interactions with other cards

By the ManaCount desk· 6 min read· Streets of New Capenna· April 29, 2022
Carte Magic Undercover Operative

Undercover Operative 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

You may have this creature enter as a copy of any creature on the battlefield, except it enters with a shield counter on it if you control that creature. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

How it works : Undercover Operative

Original English text — Wizards of the Coast / Scryfall

  1. #1· Wizards of the Coast

    If a permanent that would be dealt damage has more than one shield counter on it, that damage is prevented and only one shield counter is removed.

    No other card is named in this ruling.

  2. #2· Wizards of the Coast

    If a permanent with a shield counter is dealt unpreventable damage, that damage will be dealt and a shield counter will still be removed.

    No other card is named in this ruling.

  3. #3· Wizards of the Coast

    A creature with a shield counter on it may still be destroyed by state-based actions if it has damage marked on it equal to its toughness or has been dealt unpreventable damage by a source with deathtouch.

    No other card is named in this ruling.

  4. #4· Wizards of the Coast

    “Shield” is not an ability that creatures have and shield counters are not keyword counters. If a creature with a shield counter loses its abilities, the shield counter will still protect it as normal.

    No other card is named in this ruling.

  5. #5· Wizards of the Coast

    Shield counters don't prevent players from sacrificing creatures.

    No other card is named in this ruling.

  6. #6· Wizards of the Coast

    Removing a shield counter in this way isn't the same as regenerating a creature.

    No other card is named in this ruling.

02

Popular combos

Real combos played by the community, sorted by popularity.

Felidar Guardian
+Undercover Operative
#1

Felidar Guardian + Undercover Operative

Infinite creature LTBInfinite creature ETB
  1. 1Cast Undercover Operative by paying its mana cost, choosing to have it enter the battlefield as a copy of Felidar Guardian
  2. 2When Undercover Operative enters the battlefield, it triggers, blinking Felidar Guardian.
  3. 3When Felidar Guardian enters the battlefield, it triggers, blinking Undercover Operative. Choose to have Undercover Operative enter the battlefield as a copy of Felidar Guardian.
  4. 4Repeat from step 2.
Princess Yue
+Wormfang Newt
+Undercover Operative
#2

Princess Yue + Wormfang Newt + Undercover Operative

Infinite creature LTBInfinite creature ETBInfinite death triggersInfinite landfall triggers
  1. 1Cast Undercover Operative by paying its mana cost. Choose to have it enter as a copy of Princess Yue.
  2. 2Put Undercover Operative into your graveyard due to the legend rule.
  3. 3When Undercover Operative dies, it triggers, returning it from your graveyard to the battlefield as a land named Moon. Choose to have it enter as a copy of Wormfang Newt, gaining its abilities.
  4. 4When Undercover Operative enters, its first ability triggers, exiling it.
  5. 5When Undercover Operative leaves the battlefield, its second ability triggers, returning Undercover Operative from exile to the battlefield. Choose to have it enter as a copy of Princess Yue.
  6. 6Repeat from step 2.
Princess Yue
+Wormfang Turtle
+Undercover Operative
#3

Princess Yue + Wormfang Turtle + Undercover Operative

Infinite creature ETBInfinite creature LTBInfinite death triggersInfinite landfall triggers
  1. 1Cast Undercover Operative by paying its mana cost. Choose to have it enter as a copy of Princess Yue.
  2. 2Put Undercover Operative into your graveyard due to the legend rule.
  3. 3When Undercover Operative dies, it triggers, returning it from your graveyard to the battlefield as a land named Moon. Choose to have it enter as a copy of Wormfang Turtle, gaining its abilities.
  4. 4When Undercover Operative enters, its first ability triggers, exiling it.
  5. 5When Undercover Operative leaves the battlefield, its second ability triggers, returning Undercover Operative from exile to the battlefield. Choose to have it enter as a copy of Princess Yue.
  6. 6Repeat from step 2.
Princess Yue
+Astral Dragon
+Undercover Operative
#4

Princess Yue + Astral Dragon + Undercover Operative

Infinite creature ETBInfinite creature LTBInfinite creature token copies of all noncreature permanentsInfinite creature tokens
  1. 1Cast Undercover Operative by paying its mana cost. Choose to have it enter as a copy of Princess Yue.
  2. 2Put Undercover Operative into your graveyard due to the legend rule.
  3. 3When Undercover Operative dies, it triggers, returning it from your graveyard to the battlefield as a land named Moon. Choose to have it enter as a copy of Astral Dragon, gaining its abilities.
  4. 4When Undercover Operative enters, it triggers, creating two token copies of itself, thus creating two copies of Moon with Astral Dragon's abilities, that are 3/3 Dragon creatures in addition to its other types.
  5. 5Put all but one of the Undercover Operatives into your graveyard due to the legend rule.
  6. 6The Undercover Operative tokens each trigger. Resolve a trigger, creating two token copies of itself, thus creating two copies of Moon with Astral Dragon's abilities, that are 3/3 Dragon creatures in addition to its other types.
  7. 7Repeat from step 5.
Kiki-Jiki, Mirror Breaker
+Undercover Operative
#5

Kiki-Jiki, Mirror Breaker + Undercover Operative

Infinite creature ETBInfinite creature LTBInfinite death triggers
  1. 1Activate Kiki-Jiki by tapping it, creating a token copy of Undercover Operative that has haste. Choose to have Undercover Operative enter as a copy of Kiki-Jiki.
  2. 2Put the oldest Kiki-Jiki into the graveyard due to the legend rule.
  3. 3Repeat step 1 using the Undercover Operative token instead.
Wispweaver Angel
+Undercover Operative
#6

Wispweaver Angel + Undercover Operative

Infinite creature ETBInfinite creature LTB
  1. 1Cast Undercover Operative by paying its mana cost, choosing to have it enter the battlefield as a copy of Wispweaver Angel
  2. 2When Undercover Operative enters the battlefield, it triggers, blinking Wispweaver Angel.
  3. 3When Wispweaver Angel enters the battlefield, it triggers, blinking Undercover Operative. Choose to have Undercover Operative enter the battlefield as a copy of Wispweaver Angel.
  4. 4Repeat from step 2.
Mirror-Mad Phantasm
+Undercover Operative
#7

Mirror-Mad Phantasm + Undercover Operative

Infinite self-mill
  1. 1Activate Undercover Operative by paying {1}{U}, shuffling Undercover Operative into your library and milling your entire library due to it not having a card named Mirror-Mad Phantasm in it.
Sefris of the Hidden Ways
+Radiant Solar
+Phantasmal Image
+Undercover Operative
#8

Sefris of the Hidden Ways + Radiant Solar + Phantasmal Image + Undercover Operative

Near-infinite creature ETBNear-infinite creature LTBNear-infinite death triggersNear-infinite lifeloss for all players
  1. 1Put any nontoken creature onto the battlefield.
  2. 2When the creature enters, Radiant Solar, Undercover Operative and Phantasmal Image each trigger.
  3. 3Resolve the Radiant Solar trigger, causing you to venture into Tomb of Annihilation and into the Trapped Entry room, causing each player to lose 1 life.
  4. 4Resolve the Undercover Operative trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Radiant Solar.
  5. 5Resolve the Phantasmal Image trigger, venturing into the Cradle of the Death God room, creating a 4/4 legendary The Atropal creature token and completing Tomb of Annihilation.
  6. 6If you control two or more The Atropal tokens, put all but one into your graveyard due to the legend rule.
  7. 7Sefris' second ability triggers, returning Radiant Solar from your graveyard to the battlefield.
  8. 8Repeat from step 2.
03

Legal formats

historictimelessgladiatorpioneermodernlegacyvintagepennycommanderoathbreakerbrawlcompetitivebrawlduel
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