Didn't notice we bring it up that often :D

ETB of Abdel is to exile any number of other nonland permanents for as long he is on the battlefield, creating a 1/1 for each permanent exiled this way. To start the loop, Abdel exiles Dance of the Dead (DoD), making it leave the battlefield. Since the DoD states "if DoD is removed, bury the creature", which makes Abdel go back to the GY. When Abdel goes back to the GY, DoD comes back into play (since it was exiled with Abdel), making it possible to target Abdel once again, reanimating him. Rinse and repeat. In order for the game not to draw he has to break the loop which he does by targeting the delighted halfling in the opponents GY.

@@Viktxr to be fair, I was stuck in the Worldgorger line - here you can also just blink another creature instead of blinking DotD in order to stop the loop