Blade of the Bloodchief + Triskelavus + Ashnod's Altar

Blade of the Bloodchief

Triskelavus

Ashnod's Altar

How it works

1. Activate Ashnod's Altar by sacrificing another creature, adding CC.
2. When the creature dies, Blade of the Bloodchief triggers, putting a +1/+1 counter on Triskelavus.
3. Activate Triskelavus by paying 1 and removing a +1/+1 counter from it, creating a 1/1 Triskelavite artifact creature token.
4. Repeat.
5. Once you have infinite colorless mana, you may instead use the Triskelavite token's ability to sacrifice it, dealing infinite damage to any target(s).

This clever machinery centers around Triskelavus, which acts as both the engine's fuel source and its eventual finisher by spending its starting counters to birth Triskelavite tokens. By feeding these tokens into Ashnod's Altar, you generate the colorless mana needed to keep the cycle turning while netting a surplus. Meanwhile, Blade of the Bloodchief watches the carnage from the sidelines, steadily pumping counter after counter back onto Triskelavus to replace the ones you spent and keep the loop running indefinitely.