Aminatou, the Fateshifter + Heart of Kiran + Sun Titan

Aminatou, the Fateshifter

Heart of Kiran

Sun Titan

How it works

1. If Aminatou has two or more loyalty counters on it, activate Heart of Kiran by removing a loyalty counter from Aminatou, causing Heart of Kiran to become an artifact creature until end of turn.
2. Repeat step 1 until Aminatou has one loyalty counter on it.
3. Activate Aminatou's second loyalty ability by removing a loyalty counter from it, targeting Sun Titan.
4. Aminatou is put into your graveyard as a state-based action due to having zero loyalty.
5. Resolve the Aminatou ability, blinking Sun Titan.
6. When Sun Titan enters the battlefield, it triggers, returning Aminatou from your graveyard to the battlefield.
7. Repeat.

This clever loop exploits a clever loophole in planeswalker loyalty: Heart of Kiran's alternative crew cost allows you to strip away Aminatou, the Fateshifter's loyalty counters to animate the Vehicle without ever needing to use her actual abilities. Once Aminatou drops to zero loyalty and heads to the graveyard, her −1 ability blinks Sun Titan, whose entrance trigger immediately plucks Aminatou right back out of the graveyard and onto the battlefield refreshed. By repeating this cycle, you generate an endless stream of entering and leaving the battlefield triggers for both legendary figures, turning the planeswalker's ultimate self-sacrifice into an immortal engine.