Nim Deathmantle + Ashnod's Altar + Urza, Lord High Artificer
Produces: Infinite blue mana, Infinite colorless mana, Infinite creature tokens, Infinite death triggers, Infinite ETB, Infinite LTB, Infinite sacrifice triggers, Exile your library, Cast all spells in your library, Infinite creature tokens that are infinitely large



- Color identity
- U
- Mana
- {2}
Steps
- Activate Ashnod's Altar by sacrificing Urza, adding {C}{C}.
- When Urza dies, Nim Deathmantle triggers, causing you to pay {4} to return Urza from your graveyard to the battlefield and attach Nim Deathmantle to it.
- When Urza enters, it triggers, creating a creature token.
- Activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
- Repeat.