Heart of Light

Pacifism turned a creature off offensively but left it free to block and free to be killed; this Aura takes the idea to its logical wall. The enchanted creature can neither deal damage nor take it, which makes it a strange hybrid of neutralizer and protector. As removal it is awkward: the creature still blocks, still taps for abilities, still chumps your attackers without ever dying in combat, so against a single threat you have only declawed it, not answered it. The sharper use runs the other direction. Wrap your own blocker in this and it becomes an immovable wall that trades with nothing, soaking up the biggest attacker on the table every turn while taking zero damage in return. The mutual prevention is the whole tension here: most pacifying effects are clearly defensive or clearly offensive, but this one refuses to pick a side, which is what makes it harder to wield than a clean tap-down or a one-directional removal Aura. It points at the same creature for opposite reasons depending on whose creature it is, and a player who reaches for it as cheap removal will keep getting punished by the half it left intact.