Infinite blinkingInfinite colorless manaInfinite creature tokensInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite blinking of most creaturesInfinitely large creature until end of turn
How it works
Activate Eldrazi Displacer by paying 2C, blinking any other nontoken creature you control.
When the creature enters the battlefield, Blessed Sanctuary triggers, creating a 1/1 Soldier and a 2/2 Unicorn creature token.
Activate Ashnod's Altar twice by sacrificing the Unicorn and Soldier, adding CCCC.
Repeat.
This loop is gracefully orchestrated by Eldrazi Displacer, which continuously resets any nontoken creature to trigger its return anew. Each time that creature reappears, Blessed Sanctuary steps in to reward you with a 2/2 Unicorn token, while Queen Allenal of Ruadach's replacement effect sweetens the deal by tossing in an extra 1/1 Soldier token alongside it. Ashnod's Altar then provides the necessary engine work, letting you sacrifice those freshly minted tokens to easily generate the colorless mana required to fuel Eldrazi Displacer's ability all over again.