Phyrexian Metamorph + Ruthless Technomancer + Umbris, Fear Manifest
Phyrexian Metamorph
Artifact Creature — Phyrexian Shapeshifter
Ruthless Technomancer
Creature — Human Wizard
Umbris, Fear Manifest
Legendary Creature — Nightmare Horror
Result
- Infinite artifact ETB
- Infinite artifact LTB
- Infinite artifact sacrifice triggers
- Infinite artifact tokens
- Exile each opponent's library
- Infinite colored mana
- Infinite death triggers
- Infinite creature ETB
- Infinite creature LTB
- Infinite creature sacrifice triggers
- Infinite Treasure tokens
- Return all creature cards from your graveyard to the battlefield
Combo data from Commander Spellbook.