Sensei's Divining Top + Elsha of the Infinite + Ugin, the Ineffable

Sensei's Divining Top

Elsha of the Infinite

Ugin, the Ineffable

How it works

1. Activate Sensei's Divining Top by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
2. Cast Sensei's Divining Top from the top of your library by paying 0.
3. Elsha's prowess ability triggers, giving it +1/+1 until end of turn.
4. Repeat

This elegant loop relies on Elsha of the Infinite granting you permission to cast noncreature spells directly from the top of your library. With Ugin, the Ineffable reducing the cost of colorless spells by {2}, Sensei's Divining Top becomes completely free to recast after you tap it to draw a card and place itself back on top. Because the Top costs nothing to play and instantly returns to the library, you can repeat this cycle endlessly to churn through your deck. Along the way, Elsha of the Infinite triggers on every cast to grow infinitely large for the turn, while generating boundless storm count and card draw.