Does a creature enchanted with Pacifism lose the ability to block or just attack?

Pacifism is an Aura that reads: 'Enchanted creature can't attack or block.' This is a static ability on the Aura that imposes a restriction, preventing the enchanted creature from being declared as an attacker or a blocker. It does not remove any keyword abilities or other abilities the creature possesses.

Under CR 508.1a, a creature can't be declared as an attacker if it has a condition preventing it from attacking. Similarly, under CR 509.1b, a creature can't be declared as a blocker if it has a condition preventing it from blocking. Pacifism triggers both of these restrictions simultaneously — the creature is locked out of both roles in combat.

Importantly, Pacifism does not strip the creature of its intrinsic abilities. If the creature has First Strike, Deathtouch, Trample, or any other keyword, those abilities remain fully functional in other contexts (e.g., if it somehow ends up in combat through another effect like 'must block' or being put into combat by a spell).

Concrete example: Your opponent controls a Grizzly Bears (2/2) enchanted with your Pacifism. They cannot declare it as an attacker during their attack step, and they cannot declare it as a blocker during your attack step. However, if Grizzly Bears somehow had Deathtouch, it would still have that ability — Pacifism simply stops it from participating in either side of combat.

To summarize: Pacifism restricts both attacking AND blocking — not just one or the other. It does not remove any of the creature's abilities; it only imposes combat participation restrictions per CR 508.1 and 509.1.