Romana II + There and Back Again + Umbral Mantle
Romana II
Legendary Creature — Time Lord Scientist
There and Back Again
Enchantment — Saga
Umbral Mantle
Artifact — Equipment
Result
- Infinite artifact ETB
- Infinite artifact LTB
- Infinite artifact sacrifice triggers
- Infinite artifact tokens
- Infinite creature LTB
- Infinite creature ETB
- Infinite colored mana
- Infinite death triggers
- Infinite Treasure tokens
- Infinite untap of nontoken creatures you control
- Infinite mana nontoken creatures you control can produce
- Infinite power and toughness for certain creatures
- Infinite untap of creatures you control
- Infinite mana creatures you control can produce
- Infinitely large creature until end of turn
Combo data from Commander Spellbook.