Cast Sensei's Divining Top by paying 0 due to Sami.
When Sensei's Divining Top enters, Transplant Theorist triggers.
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.
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.
Repeat
This loop turns your artifact setup into an endless recycling engine by exploiting the interaction between the stack and the order of operations. Sami, Wildcat Captain provides the crucial cost reduction that makes Sensei's Divining Top entirely free to cast, while Transplant Theorist watches your artifacts enter the battlefield to fuel continuous loot triggers. By activating Sensei's Divining Top in response to its own entry trigger, you cleverly slip the artifact back onto your library just in time for Transplant Theorist to draw it right back out, letting you discard a card and repeat the process indefinitely.