Oathsworn Vampire | Pawn of Ulamog | Pitiless Plunderer

(and one other card)

Activate
Viscera Seer by sacrificing
Oathsworn Vampire.
When
Oathsworn Vampire 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
Viscera Seer ability, causing you to scry 1.
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.
Cast
Oathsworn Vampire from your graveyard by paying ({1} magic symbol) ({B} magic symbol) .
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.