Sensei's Divining Top + Gran-Gran + Fateful Discovery

Sensei's Divining Top

Gran-Gran

Fateful Discovery

How it works

1. Cast Sensei's Divining Top by paying 0 due to Gran-Gran.
2. When Sensei's Divining Top enters, Fateful Discovery triggers.
3. Holding priority, 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.
4. Resolve the Fateful Discovery trigger, causing you to draw Sensei's Divining Top from your library
5. Repeat

This clever loop turns a simple artifact into an endless engine for your library. Gran-Gran provides the crucial discount that lets you cast Sensei's Divining Top for free, while its triggered ability also lets you cycle through your hand. As the Top enters, Fateful Discovery spots the new artifact and triggers to draw a card, which you intercept by tapping the Top to draw and tuck it back onto the library just in time to catch it with the discovery's resolution.