Crackdown Construct + Hyalopterous Lemure

Crackdown Construct

Hyalopterous Lemure

How it works

1. Activate Hyalopterous Lemure's ability.
2. Crackdown Construct gets +1/+1 until end of turn.
3. Repeat.

By repeatedly activating Hyalopterous Lemure's zero-cost ability—which normally just shrinks its power and grants flying—we trigger Crackdown Construct's static ability over and over again. Since these non-mana activations require no resources to spam, Crackdown Construct grows into an infinitely large creature ready to swing for the win.