The Fourth Doctor + Displacer Kitten + Sensei's Divining Top + Ballad of the Black Flag

The Fourth Doctor

Displacer Kitten

Sensei's Divining Top

Ballad of the Black Flag

How it works

1. Cast Sensei's Divining Top either from your hand or from the top of your library by paying 0.
2. Displacer Kitten triggers, and The Fourth Doctor triggers if you had cast Sensei's Divining Top from your library.
3. Resolve the Displacer Kitten trigger, blinking The Fourth Doctor.
4. Resolve the Fourth Doctor trigger, if applicable, creating a Food token.
5. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top onto the top of your library.
6. Repeat.

This clever engine transforms Sensei's Divining Top into a self-contained card-drawing machine by leveraging the top-deck manipulation enabled by The Fourth Doctor. Because The Fourth Doctor allows you to look at the top of your library at any time and play historic spells from there, you can repeatedly cast Sensei's Divining Top right back onto the battlefield. Each time you cast it, Displacer Kitten triggers to blink The Fourth Doctor, refreshing your board state while Ballad of the Black Flag sits on the battlefield (though its discount isn't even strictly necessary once the loop is free, its presence as a historic Saga highlights the theme). By tapping Sensei's Divining Top to draw a card and place itself back on top of your library, you set up the very next cast, generating endless artifact triggers and infinite card draw.