Frozen in Ice

Where most blue tap-down effects rent a creature's turn, this one buys the deed. It taps the creature on entry and then bars the untap step permanently: a threat frozen here is out of the game as an attacker or blocker, since a tapped creature can neither swing nor stand in the way no matter what it once did. Stripping abilities is the second bolt on the door, and it matters most against the creatures a plain tap would leave dangerous: anything with its own untap ability that could shrug the lock off, an activated ability that pings or drains without needing to attack, a static effect that keeps working from the tapped position. That clause closes the routes around the freeze rather than the freeze itself. What keeps the whole apparatus breakable is the enchantment shell carrying it. It does nothing once the creature is dead, it falls to any of blue and white's wide enchantment answers, and bouncing, blinking, or exiling and reanimating the frozen creature wipes the effect clean. This is the design lineage where blue neutralizes a creature without ever destroying it, sitting alongside Claustrophobia and other prison auras, but pushed to the harsher end of the family: not a stall while you dig for real removal, but the removal itself, contingent only on the Aura outliving the thing it holds.