Pacifism

The 'Prison' / 'Imprisoning' answer: the targeted creature stays on the battlefield but is rendered harmless. Covers can't-attack-or-block enchantments (Pacifism, Arrest, Faith's Fetters), doesn't-untap lockdown (Claustrophobia, Sleep), and transmute-shrink effects that strip a creature's abilities and turn it into a vanilla body (Darksteel Mutation, Kenrith's Transformation, Lignify, Kasmina's Transmutation). This is the soft-removal bucket that removal.spot_removal (destroy/exile only) and removal.bounce (return to hand) leave uncovered, predominantly white and blue. Distinct from control.pillow_fort, which deters attacks against the PLAYER ('creatures can't attack you'), and from keyword punishers that shut down creatures sharing a keyword.