Ghouls' Night Out + Phyrexian Altar + Blessed Sanctuary + Mnemonic Wall

Ghouls' Night Out

Phyrexian Altar

Blessed Sanctuary

Mnemonic Wall

How it works

1. Cast Ghouls' Night Out by paying 3, returning Mnemonic Wall from your graveyard to the battlefield, and at least two other creatures from your opponents' graveyards to the battlefield under your control.
2. When Mnemonic Wall and the creatures enter the battlefield, Blessed Sanctuary triggers once for each creature, and Mnemonic Wall triggers once.
3. Resolve the Mnemonic Wall 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 Mnemonic Wall, two creatures your opponents own, and two Unicorns, adding 3.
6. Repeat.

This brilliant loop uses **Ghouls' Night Out** to resurrect **Mnemonic Wall** along with other creatures from graveyards, turning the Wall's entry into a way to buy the spell right back into your hand. Meanwhile, **Blessed Sanctuary** watches over your board by generating a 2/2 white Unicorn token for every creature that enters the battlefield, which conveniently bypasses the downside of the decayed creatures you just reanimated. You then feed those Unicorns, the Wall, and your other reanimated targets straight into **Phyrexian Altar**, sacrificing them to generate the exact mana needed to cast Ghouls' Night Out all over again.