Phyrexian Altar + Wormfang Drake + Karmic Guide

Phyrexian Altar

Wormfang Drake

Karmic Guide

How it works

1. Cast Wormfang Drake by paying its mana cost.
2. When Wormfang Drake enters, its first ability triggers, exiling Karmic Guide.
3. Activate Phyrexian Altar by sacrificing Wormfang Drake.
4. When Wormfang Drake dies, its second ability triggers, returning Karmic Guide from exile to the battlefield.
5. When Karmic Guide enters, it triggers, returning Wormfang Drake from your graveyard to the battlefield.
6. When Wormfang Drake enters, its first ability triggers, exiling Karmic Guide.
7. Repeat from step 3.