The Legend of Kuruk // Avatar Kuruk | Ichormoon Gauntlet

Cards

All permanents on the battlefield (
The Legend of Kuruk // Avatar Kuruk as
Avatar Kuruk).

({20} magic symbol) minus ({1} magic symbol) for each creature and artifact you control each turn available available.

Activate
Avatar Kuruk by paying ({20} magic symbol) minus ({1} magic symbol) for each creature and/or artifact you can tap while activating it, causing you to take an extra turn after this one.
At the beginning of your end step,
The Mighty Thor triggers, blinking
Avatar Kuruk and causing it to return to the battlefield as
The Legend of Kuruk with a lore counter on it.
The Legend of Kuruk's first chapter ability triggers, causing you to scry 2 and draw a card.
Move to your next turn. At the beginning of your precombat main phase.
The Legend of Kuruk triggers, putting a lore counter on it. Its second chapter ability then triggers, causing you to scry 2 and draw a card.
Activate a Planeswalker by putting zero loyalty counters on it, putting a lore counter on
The Legend of Kuruk.
The Legend of Kuruk's third chapter ability triggers, causing you to exile it and return it to the battlefield as
Avatar Kuruk.
Repeat.

This combo has been estimated to be Ruthless (Bracket 4+).