Emeria Shepherd + Felidar Guardian + Altar of Dementia

Emeria Shepherd

Felidar Guardian

Altar of Dementia

How it works

1. Cast Felidar Guardian by paying 3.
2. Felidar Guardian enters the battlefield, blinking Plains.
3. Emeria Shepherd triggers.
4. Holding priority, activate Altar of Dementia by sacrificing Felidar Guardian, causing target player to mill one card.
5. Resolve the Emeria Shepherd trigger, returning Felidar Guardian from your graveyard to the battlefield.
6. Repeat from step 2.