Bloodsoaked Champion | Altar of Dementia | Pitiless Plunderer

(and one other card)

Activate
Altar of Dementia by sacrificing
Bloodsoaked Champion.
When
Bloodsoaked Champion dies,
Pitiless Plunderer and
Pawn of Ulamog trigger.
Resolve the
Pitiless Plunderer trigger, creating a Treasure artifact token.
Resolve the
Pawn of Ulamog trigger, creating a 0/1 Eldrazi Spawn creature token.
Resolve the
Altar of Dementia ability, causing target player to mill cards equal to
Bloodsoaked Champion's power.
Activate the Treasure by tapping and sacrificing it, adding ({B} magic symbol) .
Activate the Eldrazi Spawn by sacrificing it, adding ({C} magic symbol) .
When the Eldrazi Spawn dies,
Pitiless Plunderer triggers, creating a Treasure token.
Activate
Bloodsoaked Champion by paying ({1} magic symbol) ({B} magic symbol) , returning it to the battlefield from your graveyard.
Repeat any number of times.
Once you have infinite Treasure tokens, you may repeat this loop spending mana from Treasures instead of Eldrazi Spawns in step 7, giving you infinite Eldrazi Spawn tokens.