Golbez, Crystal Collector + Repository Skaab + Walk the Aeons

Golbez, Crystal Collector

Repository Skaab

Walk the Aeons

How it works

1. Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one.
2. Cast Repository Skaab by paying 3.
3. When Repository Skaab enters the battlefield, its first ability triggers, causing it to exploit itself. Its second ability then triggers, returning Walk the Aeons from your graveyard to your hand.
4. At the beginning of your end step, Golbez's second ability triggers, returning Repository Skaab from your graveyard to your hand.
5. Repeat each turn.

By casting Walk the Aeons, you secure an extra turn to keep the engine rolling, while its buyback cost isn't even necessary thanks to the rest of your graveyard recursion. Repository Skaab pulls your extra-turn spell right back out of the graveyard the moment it hits the battlefield, using its own exploit ability to sacrifice itself cleanly into the bin. Once you reach the end step, Golbez, Crystal Collector spots your accumulated artifact count and returns Repository Skaab straight back to your hand, ready to be recast and repeat the loop indefinitely.