Drannith Magistrate

Your opponents can't cast spells from anywhere other than their hands.

Fiend Hunter

When Fiend Hunter enters, you may exile another target creature.
When Fiend Hunter leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Panharmonicon

If an artifact or creature entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Have

Getting

Don't Have

{"ops":[{"insert":"Create an infinite exile creature cycle to create infinite ETBs/LTBs.\n"}]}