Prerequisites
- Umbral Mantle on the battlefield
- Selvala, Eager Trailblazer on the battlefield
Steps
- Activate Selvala by tapping it, adding at least three mana of any color
- Activate Selvala by paying
and untapping it, giving it +2/+2 until end of turn
- Repeat
Results
- Infinite colored 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
Selvala, Eager Trailblazer
Legendary Creature — Elf Scout