Because it's a Hate Bear leader or adjunct, or a Voltron, Aura, or Equipment leader that cannot be countered or answered instantly
Hard to go far wrong with this great early game setup card that turns into a late game finishing move
Zone or 99: Zone Sauron, the Dark Lord Like Saruman above, Sauron makes sure your opponents have to suffer if they want to mess with him
He comes in indestructible and his ability automatically triggers at end step, so this feels sort of like an Etali where you pay one mana more to guarantee at least one trigger while also draining your opponents for a bunch of life
Cerberus is that while its obvious how much value you could get by tripling up some ridiculous spell, the floor on it is abysmally low
Possibly the most fun interaction is with Containment Priest, where the ability just permanently exiles creatures