Thraben Doomsayer + Thornbite Staff + Altar of Dementia

Thraben Doomsayer

Thornbite Staff

Altar of Dementia

How it works

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