Falco Spara, Pactweaver + Sensei's Divining Top + Etherium Sculptor + Lorescale Coatl

Falco Spara, Pactweaver

Sensei's Divining Top

Etherium Sculptor

Lorescale Coatl

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. Lorescale Coatl 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.

By tapping Sensei's Divining Top to draw a card and place itself back on top of your library, you trigger Lorescale Coatl to grow with a new +1/+1 counter. Falco Spara, Pactweaver then steps in to let you cast that very same Sensei's Divining Top directly from the top of your library by trading away one of those newly minted counters instead of paying mana. To make this engine completely free, Etherium Sculptor discounts the artifact's cost down to zero, allowing you to loop the entire process endlessly for a near-infinite storm count and limitless card draw.