Color Identity: B

Initial Card State
- Priest of Gix in your graveyard.
- Chthonian Nightmare and Cathodion on the battlefield.
Notable Prerequisites
- You have at least three energy counters.
Steps
- Activate Chthonian Nightmare by paying ({E} magic symbol)
({E} magic symbol)
({E} magic symbol)
, sacrificing Cathodion and returning Chthonian Nightmare from the battlefield to your hand. - When Cathodion dies, it triggers, adding ({C} magic symbol)
({C} magic symbol)
({C} magic symbol)
. - Resolve the Chthonian Nightmare ability, returning Priest of Gix from your graveyard to the battlefield.
- When Priest of Gix enters the battlefield, it triggers, adding ({B} magic symbol)
({B} magic symbol)
({B} magic symbol)
. - Cast Chthonian Nightmare by paying ({1} magic symbol)
({B} magic symbol)
. - When Chthonian Nightmare enters the battlefield, it triggers, causing you to get ({E} magic symbol)
({E} magic symbol)
({E} magic symbol)
. - Activate Chthonian Nightmare by paying ({E} magic symbol)
({E} magic symbol)
({E} magic symbol)
, sacrificing Priest of Gix and returning Chthonian Nightmare from the battlefield to your hand, returning Cathodion from your graveyard to the battlefield. - Cast Chthonian Nightmare by paying ({1} magic symbol)
({B} magic symbol)
. - When Chthonian Nightmare enters the battlefield, it triggers, causing you to get ({E} magic symbol)
({E} magic symbol)
({E} magic symbol)
. - Repeat.
Results
- Infinite black mana.
- Infinite colorless mana.
- Infinite death triggers.
- Infinite ETB.
- Infinite LTB.
- Infinite sacrifice triggers.
- Infinite storm count.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).