Glyph of Doom
{B}
Instant
Oracle Text
Choose target Wall creature. At this turn's next end of combat, destroy all creatures that were blocked by that creature this turn.
Watch Out
Static ability — always active, can't be responded toRules Note
This card has a static ability that applies continuously as long as it's on the battlefield. There's no trigger or activation — the effect just exists. Removing the permanent is the only way to stop it.