Ulamog's Dreadsire + Thornbite Staff + Altar of Dementia

Ulamog's Dreadsire

Thornbite Staff

Altar of Dementia

How it works

1. Activate Ulamog's Dreadsire by tapping it, creating a 10/10 Eldrazi creature tokens.
2. Activate Altar of Dementia by sacrificing the Eldrazi token.
3. When the Eldrazi token dies, Ulamog's Dreadsire triggers, untapping Ulamog's Dreadsire.
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the Eldrazi's power.
5. Repeat.

By weaponizing Ulamog's Dreadsire's ability to manufacture massive Eldrazi tokens, this loop turns raw token generation into an unstoppable engine of destruction. Equipping it with Thornbite Staff grants the Dreadsire a built-in untap trigger whenever a creature bites the dust, ensuring it never stays tapped for long. Add in Altar of Dementia to immediately sacrifice those freshly minted tokens for an escalating storm of mill that completely decks an opponent.