Crackdown Construct + Lavaclaw Reaches
Crackdown Construct must be on the battlefield. Lavaclaw Reaches must be on the battlefield. Mana needed:
- Activate Lavaclaw Reaches's ability so that it becomes a creature.
- Activate it to give it +0/+0 until end of turn infinite times to get infinite Construct triggers.
Infinitely large Crackdown Construct until end of turn.