Patron of the Waifs

Whenever a creature attacks you, that creature's controller puts the top card of their library into
their graveyard.
{3}{u/b}, Tap an untapped creature you control with
power 1 or less: Draw cards equal to the number
of cards target opponent put into their graveyard
this turn. Activate this ability only once per turn.
Some street waifs find friends in the most
unlikely places.