black luster soldier card sleeves Fanattik YU-GI-Oh! - featuring stunning extended art design. Black Luster Soldier [DT07-EN030] Rare

The triggered ability goes on the stack before the spell resolves, and there is free timing before the spell resolves, so if you are triggering this with a combat trick that has an untap effect, don't forget to fire one off before the spell

Pendulum Effect: Once per turn, if a Normal Monster you control destroys an opponent's monster by battle, after damage calculation: You can add 1 Level 4 or higher Normal Monster from your Deck to your hand

If you really want to know more about Paulo, he even summarized the path of his Magic career for you in three parts

Cheap artifacts with death triggers or refund abilities maximise Repurposing Bays efficiency

Getting the angle of the sword right, and all those intricate runes correct, was very time consuming