Prerequisites
- Umbral Mantle on the battlefield
- Metalworker on the battlefield
Steps
- Activate Metalworker by tapping it, revealing at least two artifact cards from your hand and adding at least
- Activate Metalworker by paying
and untapping it, giving it +2/+2 until end of turn
- Repeat
Results
- Infinite colorless mana
- Infinite untap of creatures you control
- Infinite mana creatures you control can produce
- Infinitely large creature until end of turn
Required Cards 2
Umbral Mantle
Artifact — Equipment
Metalworker
Artifact Creature — Construct