Blossoming Tortoise + Crackdown Construct + Mutavault

Prerequisites

—

Steps

1. 1Activate Mutavault's second ability by paying , causing it to become a 2/2 creature with all creature types in addition to its other types until end of turn.
2. 2Activate Mutavault's second ability by paying .
3. 3Crackdown Construct triggers, giving itself +1/+1 until end of turn.
4. 4Repeat from step 2.

Effects

• Infinitely large creature until end of turn