Ao, the Dawn Sky + Doubling Season + Nim Deathmantle + Phyrexian Altar + Workhorse
Ao, the Dawn Sky
Legendary Creature — Dragon Spirit
Doubling Season
Enchantment
Nim Deathmantle
Artifact — Equipment
Phyrexian Altar
Artifact
Workhorse
Artifact Creature — Horse
Result
- Infinite +1/+1 counters on most creatures you control
- Infinite +1/+1 counters on all Vehicles you control
- Infinite colored mana
- Infinite colorless mana
- Infinite death triggers
- Infinite creature ETB
- Infinite creature LTB
- Infinite creature sacrifice triggers
- Put a selection of permanent cards from your library onto the battlefield
Combo data from Commander Spellbook.