Sensei's Divining Top + Bolas's Citadel + Teething Wurmlet

Sensei's Divining Top

Bolas's Citadel

Teething Wurmlet

How it works

1. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top from the battlefield onto the top of your library.
2. Cast Sensei's Divining Top from the top of your library by paying 1 life.
3. When Sensei's Divining Top enters the battlefield, Teething Wurmlet triggers, causing you to gain 1 life.
4. Repeat.

This ingenious loop transforms Bolas's Citadel into a self-sustaining engine by letting you cast spells directly from the top of your library using life instead of mana. With the Citadel in play, you activate Sensei's Divining Top to draw a card and place itself back on top of your library, making it immediately available to recast for a mere 1 life. Meanwhile, Teething Wurmlet watches this artifact dance and happily restores your spent life on every single entry, negating the Citadel's cost and keeping your engine safely alive as you churn through your deck.