Sensei's Divining Top + The Reality Chip + Voyager Quickwelder

Sensei's Divining Top

The Reality Chip

Voyager Quickwelder

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 loop relies on manipulating the top of your library to repeatedly cast and draw Sensei's Divining Top at no net mana cost. The Reality Chip is the linchpin of the operation, granting you permission to cast the Top directly from the top of your library thanks to its reconfigured state. Meanwhile, Voyager Quickwelder quietly greases the wheels by reducing the artifact's casting cost by {1}, allowing you to replay Sensei's Divining Top for free each time you tap it to draw a card and place it back on top of your library.