Spider Gwen, Ghost Spider

Spider Gwen, Ghost Spider can't be blocked.
Whenever another Hero enters the battlefield
under your control, scry 1, then exile the top
card of your library. If it's a noncreature card,
Spider Gwen gains "Whenever Spider Gwen
deals combat damage to a player, each player
discards their hand, then draws cards equal to
the greatest number of cards a player discarded
this way" until end of turn.