Audrie, Heart of Steel

Partners in Crime - {b},{t}: Search your library or graveyard for a card named Mousey and put it
into your hand, then shuffle your library.
Sneak Attack - When this creature attacks,
roll a d20.
1-9 This creature gains deathtouch
until the end of turn.
10-19 This creature gains +1/+0 and
deathtouch until the end of turn.
20 This creature gains +3/+0, first strike, and deathtouch until the end of turn.