Ghouls' Night Out + Phyrexian Altar + Blessed Sanctuary + Shipwreck Dowser

Ghouls' Night Out

Phyrexian Altar

Blessed Sanctuary

Shipwreck Dowser

How it works

1. Cast Ghouls' Night Out by paying 3, returning Shipwreck Dowser from your graveyard to the battlefield, and at least two other creatures from your opponents' graveyards to the battlefield under your control.
2. When Shipwreck Dowser and the creatures enter the battlefield, Blessed Sanctuary triggers once for each creature, and Shipwreck Dowser triggers once.
3. Resolve the Shipwreck Dowser trigger, returning Ghouls' Night Out from your graveyard to your hand.
4. Resolve all Blessed Sanctuary triggers, creating that many 2/2 Unicorn creature tokens.
5. Activate Phyrexian Altar five times by sacrificing Shipwreck Dowser, two creatures your opponents own, and two Unicorns, adding 3.
6. Repeat.

This ingenious graveyard loop spins into an infinite engine by leveraging Ghouls' Night Out to repeatedly harvest Shipwreck Dowser alongside whatever else lingers in the graveyards. As Shipwreck Dowser enters the battlefield, its ability snatches Ghouls' Night Out right back from your graveyard to your hand, while Blessed Sanctuary cushions your side of the board and generously manufactures a 2/2 white Unicorn token for every single creature that enters. You then feed Shipwreck Dowser, the returned creatures, and the freshly minted Unicorns into the maw of Phyrexian Altar to generate all the mana needed to recast the spell.