Sensei's Divining Top + Transplant Theorist + The Immortal Sun

Sensei's Divining Top

Transplant Theorist

The Immortal Sun

How it works

1. Cast Sensei's Divining Top by paying 0 due to The Immortal Sun.
2. When Sensei's Divining Top enters, Transplant Theorist 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 Transplant Theorist 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 clever engine harnesses the cost-reducing static ability of The Immortal Sun to cast Sensei's Divining Top entirely for free. Instead of letting the Top resolve normally, you tap it in response to its own entry, drawing a card while tucking Sensei's Divining Top safely onto the top of your library just in time to catch the loot trigger from Transplant Theorist. Cycling the Top back into your hand this way lets you discard unneeded cards while triggering Transplant Theorist's entry ability over and over, generating endless storm count, draw triggers, and graveyard fodder without ever spending a single drop of mana.