Falco Spara, Pactweaver + Sensei's Divining Top + Herald of Kozilek + Oneirophage

Falco Spara, Pactweaver

Sensei's Divining Top

Herald of Kozilek

Oneirophage

How it works

1. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
2. Oneirophage triggers, putting a +1/+1 counter on it.
3. Cast Sensei's Divining Top from the top of your library by paying 0 and removing a counter from a creature you control.
4. Repeat.

This brilliant loop turns your library into a bottomless well by leaning on Falco Spara, Pactweaver to cast spells directly from the top, bypassing mana costs entirely by trading away counters. Sensei's Divining Top fuels the engine by constantly redrawing itself and placing itself right back on top of your library to keep the chain unbroken. Meanwhile, Herald of Kozilek drops the Top's mana cost down to zero, ensuring you never run out of juice, while Oneirophage happily grows to gargantuan proportions with every single card drawn along the way.