Triskelavus + Cauldron of Souls + Clock of Omens + Krark-Clan Ironworks

Triskelavus

Cauldron of Souls

Clock of Omens

Krark-Clan Ironworks

How it works

1. Activate Cauldron of Souls by tapping it, giving Triskelavus persist until end of turn.
2. Activate Krark-Clan Ironworks by sacrificing Triskelavus, adding CC.
3. When Triskelavus dies, its persist ability triggers, returning it from your graveyard to the battlefield with two +1/+1 counters on it.
4. Activate Triskelavus' first ability twice by paying 2 and removing two +1/+1 counters from it, creating two 1/1 Triskelavite artifact creature tokens.
5. Activate Clock of Omens by tapping Triskelavus and a Triskelavite, untapping Cauldron of Souls.
6. Repeat.
7. Once you have infinite Triskelavite tokens, you may sacrifice them to deal infinite damage to any target(s).