the front side of Crackdown Construct
the back of a classic MtG card
the front side of Song of Freyalise
the back of a classic MtG card
the front side of Endling
the back of a classic MtG card

Color Identity: B, G

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. Endling does not have summoning sickness.
  2. Song of Freyalise has one or two lore counters on it.

Steps

  1. Activate Endling by tapping it, adding one black mana.
  2. Activate Endling's first ability by paying one black mana.
  3. Crackdown Construct triggers, giving itself +1/+1 until end of turn.
  4. Resolve the Endling ability, untapping it.
  5. Repeat.

Results

  1. Infinitely large creature until end of turn.
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