Sneak Attack + Wizard Mentor + Priest of Gix + Chromatic Orrery

Sneak Attack

Wizard Mentor

Priest of Gix

Chromatic Orrery

How it works

1. Activate Sneak Attack by paying 1, putting Priest of Gix from your hand onto the battlefield and giving it haste.
2. When Priest of Gix enters the battlefield, it triggers, adding ..
3. Activate Sneak Attack by paying 1, putting Wizard Mentor from your hand onto the battlefield and giving it haste.
4. Activate Wizard Mentor by tapping it, returning it and Priest of Gix from the battlefield to your hand.
5. Repeat.