Death Kiss

Most political creatures in the multiplayer canon are defensive tools that redirect combat: goad points attackers at your neighbors, Lure and its cousins draw swings elsewhere, and the whole grief-engine of group play runs on steering damage away from yourself. This Beholder pursues the same protective end by a crueler route. The triggered ability fires the instant a creature an opponent controls attacks one of your other opponents, doubling that attacker's power on declaration, before combat damage, before blockers even matter to the math. The point is not to survive the swing but to make the swing catastrophic for the table you are not part of. The monstrosity clause closes the loop: pay into it and you goad up to X of those same opponent creatures, compelling them into attacks the trigger will amplify the moment they are declared. So the two halves collaborate. One manufactures the attack, the other punishes it, and the goad both protects you (creatures forced to attack a rival cannot come for you) and feeds the power-doubling engine that turns those forced swings lethal. As a 5/5 with the goad button folded into a monstrosity activation, it does not need to be the biggest body on the board. It needs the board at war with itself, which is exactly the arrangement it engineers: a creature that wins by orchestration, caring only about the attacks it will never have to receive.