Sensei's Divining Top + Helm of Awakening + Skyswimmer Koi

Sensei's Divining Top

Helm of Awakening

Skyswimmer Koi

How it works

1. Cast Sensei's Divining Top by paying 0 due to Helm of Awakening.
2. When Sensei's Divining Top enters, Skyswimmer Koi 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 Skyswimmer Koi trigger, causing you to draw Sensei's Divining Top from your library, and then discard a card other than Sensei's Divining Top.
5. Repeat

This elegant loop turns a simple top into an endless engine by leveraging Helm of Awakening to reduce the casting cost of Sensei's Divining Top down to free. Once the Top is on the battlefield, its own tap ability draws you a card while sending it back to your library, which simultaneously triggers Skyswimmer Koi to loot you through your deck. Because Skyswimmer Koi lets you draw the exact same Sensei's Divining Top right back off the top of your library and discard a surplus card, you can recast it for zero mana and repeat the process indefinitely.