Sea Creeper Dhelmise

Islandwalk
Whenever Sea Creeper Dhelmise attacks, it gets
+1/+1 for each treasure defending player
controls until end of turn.
Whenever Sea Creeper Dhelmise deals combat
damage to a player, that player may sacrifice a nontoken artifact or creature. If that player does,
they create a treasure token. If that player
doesn't, you create a treasure token.