Ancestral Statue + Kozilek's Unsealing + Adrix and Nev, Twincasters

Ancestral Statue

Kozilek's Unsealing

Adrix and Nev, Twincasters

How it works

1. Cast Ancestral Statue by paying 4.
2. Kozilek's Unsealing's first ability triggers, creating four 0/1 Eldrazi Spawn creature tokens.
3. When Ancestral Statue enters the battlefield, it triggers, returning itself from the battlefield to your hand.
4. Activate the Eldrazi Spawns by sacrificing them, adding CCCC.
5. Repeat.

This clever loop turns the self-bouncing nature of Ancestral Statue into a self-sustaining engine, cast for four mana and returning itself to your hand upon entering the battlefield. Kozilek's Unsealing acts as the crucial payoff here, triggering off the statue's mana value of 4 to flood the board with Eldrazi Spawn tokens. Meanwhile, Adrix and Nev, Twincasters supercharges that token generation by doubling the Eldrazi Spawns produced, yielding four tokens per loop instead of two. Sacrificing those duplicated tokens easily pays the {4} casting cost to replay the statue, leaving you with infinite colorless mana, infinite tokens, and countless enters-the-battlefield triggers.