Nim Deathmantle + Ashnod's Altar + Scampering Scorcher
Nim Deathmantle
Ashnod's Altar
Scampering Scorcher
Infinite colorless manaInfinite creature tokens with hasteInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggers
How it works
Activate Ashnod's Altar by sacrificing Scampering Scorcher, adding CC.
Scampering Scorcher dies, triggering Nim Deathmantle, causing you to pay 4 to return Scampering Scorcher from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Scampering Scorcher enters the battlefield, creating two 1/1 Elemental creature tokens and giving Elementals you control haste until end of turn.
Activate Ashnod's Altar by sacrificing an Elemental token, adding CC.