Initial Card State
- Cavern Harpy in hand.
- Primal Prayers and Decoction Module on the battlefield.
Notable Prerequisites
- You have at least ({E} magic symbol)
or enough mana to cast Cavern Harpy.
Steps
- Cast Cavern Harpy by paying ({E} magic symbol)
due to Primal Prayers, if able, or by paying its mana cost. - When Cavern Harpy enters the battlefield, it and Decoction Module trigger.
- Resolve the Decoction Module trigger, causing you to get ({E} magic symbol)
. - Resolve the Cavern Harpy trigger, returning it from the battlefield to your hand.
- Repeat.
Results
- Infinite LTB.
- Infinite ETB.
- Infinite storm count.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).