Black Widow

Black Widow can only be blocked by creatures with vigilance.

Whenever Black Widow deals combat damage to a player, you may prevent that damage and that player mills cards equal to Black Widow's power.

{u/b}{u/b}, {t}: Look at the top two cards of target player's library. You may put those cards back at the top in any order, to the graveyard or at the bottom of their library.