"Revised Edition", +m/when(ever)?\s.*\s(becomes?\sblocked|blocks)/, +!bushido, +!flanking, +!rampage (2)
Flying
Whenever Cockatrice blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.
Whenever Thicket Basilisk blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.
Gatherer works better in the Companion app!