Solemnity + Luminous Broodmoth + Repository Skaab

Solemnity

Luminous Broodmoth

Repository Skaab

How it works

1. Cast Repository Skaab by paying its mana cost.
2. When Repository Skaab enters, its exploit ability triggers, causing you to sacrifice it.
3. Luminous Broodmoth and Repository Skaab's second ability trigger.
4. Resolve the Repository Skaab trigger, returning an instant or sorcery from your graveyard to your hand.
5. Resolve the Luminous Broodmoth trigger, returning Repository Skaab from your graveyard to the battlefield without a flying counter on it due to Solemnity.
6. Repeat from step 2

This clever loop turns Repository Skaab into an endlessly recurring recycling machine for your spells by exploiting itself over and over. Normally, Luminous Broodmoth would put a flying counter on the Skaab when it returns, permanently granting it flying and shutting down the loop after one use—but Solemnity's static ability brilliantly prevents any counters from ever being placed. With the counter thwarted, the Broodmoth brings Repository Skaab back completely fresh every single time it hits the graveyard, allowing you to repeatedly trigger its exploit ability to pull every instant and sorcery right back out of your graveyard.