Colossal Gloomweaver

Menace, reach
Whenever Colossal Gloomweaver or another
Spider enters the battlefield under your control,
put a web counter on Colossal Gloomweaver.
Non-Spider creatures with power less than or
equal to the number of web counters on Colossal Gloomweaver can't attack. Any player may
sacrifice a creature for that player to ignore this
effect until end of turn.