Aminatou, the Fateshifter + Ichormoon Gauntlet + Doubling Season + Ugin, the Spirit Dragon

Aminatou, the Fateshifter

Ichormoon Gauntlet

Doubling Season

Ugin, the Spirit Dragon

How it works

1. Activate any other planeswalker you control by putting zero loyalty counters on it, putting a loyalty counter on Aminatou.
2. Activate Aminatou's second loyalty ability by removing a loyalty counter from it, blinking Ugin.
3. Ugin enters the battlefield with fourteen loyalty counters due to Doubling Season.
4. Activate Ugin by removing twelve loyalty counters from it, causing you to take an extra turn after this one.
5. Repeat each turn.