Gaze of the Gorgon
{3}{B/G}
Instant
({b/g} can be paid with either {B} or {G}.)
Regenerate target creature. At this turn's next end of combat, destroy all creatures that blocked or were blocked by it this turn.
Glyph of Doom
{B}
Instant
Choose target Wall creature. At this turn's next end of combat, destroy all creatures that were blocked by that creature this turn.
Triton Tactics
{U}
Instant
Up to two target creatures each get +0/+3 until end of turn. Untap those creatures. At this turn's next end of combat, tap each creature that was blocked by one of those creatures this turn and it doesn't untap during its controller's next untap step.
Venomous Breath
{3}{G}
Instant
Choose target creature. At this turn's next end of combat, destroy all creatures that blocked or were blocked by it this turn.