The Eternal Ordeal

[1]: Mill 1 card, then create Zote, a 0/1 legendary black Insect Warrior creature token
[2]: Mill 2 cards, then create a 2/1 black Insects with reach
[3]: Mill 3 cards, then create a 1/2 black Insect with flying
[4]: Mill 4 cards, then create a 0/3 black Insect with Defender and “when this creature dies, it deals 1 damage to each creature
[5]: Exile the eternal ordeal, then return it to the battlefield under target opponent's control