Felidar Guardian + Karmic Guide + Altar of Dementia

Felidar Guardian

Karmic Guide

Altar of Dementia

How it works

1. Cast Felidar Guardian by paying 3.
2. Felidar Guardian's ability triggers, targeting Karmic Guide.
3. In response, activate Altar of Dementia by sacrificing Felidar Guardian, causing target player to mill a card.
4. Resolve Feldiar Guardian's trigger, blinking Karmic Guide.
5. Karmic Guide triggers, returning Felidar Guardian from your graveyard to the battlefield.
6. Repeat from step 2.