Color Identity: U, B

Prerequisites

  1.  
    Great Whale
    Great Whale     in hand.
  2.  
    Satoru Umezawa
    Satoru Umezawa     and
    Silver-Fur Master
    Silver-Fur Master     on the battlefield.
  3. You control another nontoken creature that can attack this turn, and that cannot be blocked by an opponent.
  4. You control up to seven lands that can tap to produce at least ({3} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  ({B} magic symbol)  ({B} magic symbol)  .

Steps

  1. Declare another nontoken creature as an attacker.
  2. When the creature isn't blocked by an opponent, activate up to seven lands you control by tapping them, adding at least ({3} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  ({B} magic symbol)  ({B} magic symbol)  .
  3. Activate
    Great Whale
    Great Whale    's ninjitsu ability by paying ({1} magic symbol)  ({U} magic symbol)  ({B} magic symbol)   and returning the unblocked creature to your hand, putting
    Great Whale
    Great Whale     onto the battlefield tapped and attacking.
  4. Great Whale
    Great Whale     enters the battlefield, untapping the seven lands.
  5. Activate any creature card in your hand's ninjitsu ability by paying ({1} magic symbol)  ({U} magic symbol)  ({B} magic symbol)   and returning
    Great Whale
    Great Whale     to your hand, putting the creature onto the battlefield tapped and attacking.
  6. Activate up to seven lands you control by tapping them, adding at least ({3} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  ({B} magic symbol)  ({B} magic symbol)  .
  7. Repeat from step 3.

Results

  1. Infinite ETB.
  2. Infinite LTB.
  3. Infinite mana lands you control can produce.
  4. Infinite untap of lands you control.

Metadata

  1. In 624 decks according to EDHREC.
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