Sensei's Divining Top + Foundry Inspector + Experimental Frenzy

Sensei's Divining Top

Foundry Inspector

Experimental Frenzy

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. Repeat

This ingenious loop turns your library's top card into a self-sustaining engine by marrying top-deck manipulation with cost reduction. With Experimental Frenzy letting you cast artifacts straight from the top of your library, Sensei's Divining Top can tap to draw itself and immediately place itself back on top. Meanwhile, Foundry Inspector steps in to slash the artifact's mana cost down from one generic mana to zero, allowing you to endlessly cycle the Top for free to draw your entire deck and rack up an astonishing storm count.