Infinite colorless manaInfinite creature tokensInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite untap of creatures you controlInfinite mana creatures you control can produceInfinitely large creature until end of turn
How it works
Activate Krenko by tapping it, creating at least two 1/1 Goblin creature tokens.
Activate Ashnod's Altar twice by sacrificing two Goblin tokens, adding CCCC.
Activate Krenko by paying 3 and untapping it, giving it +2/+2 until end of turn.