Rakdos, the Muscle | Priest of Gix | Haunted Crossroads

(and two other cards)

Activate
Altar of Dementia by sacrificing
Priest of Gix.
When
Priest of Gix dies,
Sifter of Skulls and
Rakdos trigger.
Resolve the
Sifter of Skulls trigger, creating a 1/1 Eldrazi Scion creature token.
Holding priority, activate
Haunted Crossroads by paying ({B} magic symbol) , putting
Priest of Gix from your graveyard onto the top of your library.
Resolve the
Rakdos trigger, causing you to exile the top three cards of your library with the ability to play them until your next end step.
Resolve the
Altar of Dementia ability from step 1, causing target player to mill cards equal to
Priest of Gix's power.
Activate the Eldrazi Scion by sacrificing it, adding ({C} magic symbol) .
Cast
Priest of Gix from exile by paying ({3} magic symbol) .
When
Priest of Gix enters the battlefield, it triggers, adding ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Repeat.

Infinite mill.
Infinite self-mill.
Infinite LTB.
Infinite ETB.
Infinite sacrifice triggers.
Infinite death triggers.
Infinite storm count.
Exile your library with the ability to play the exiled cards until your next turn.