the front side of Nadir Kraken
the back of a classic MtG card
the front side of Symmetry Matrix
the back of a classic MtG card
the front side of Mana Echoes
the back of a classic MtG card

Color Identity: U, R

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. You have a way to draw a card.

Mana Needed

  1. two generic mana available.

Steps

  1. Draw a card.
  2. Nadir Kraken triggers, causing you to pay one generic mana to put a +1/+1 counter on it, and to create a 1/1 Tentacle creature token.
  3. The Tentacle enters the battlefield, triggering Mana Echoes and Symmetry Matrix.
  4. Resolve the Mana Echoes, adding one colorless mana for each Tentacle you control.
  5. Resolve the Symmetry Matrix trigger, causing you to pay one generic mana to draw a card.
  6. Repeat from step 2.

Results

  1. Infinite card draw.
  2. Infinite draw triggers.
  3. Near-infinite +1/+1 counters on a creature.
  4. Near-infinite colorless mana.
  5. Near-infinite creature tokens.
  6. Near-infinite creature ETB.
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