Ranni, Witch of Nokron

Flying
Whenever Ranni would become the target of
a spell, you may pay {u}{b}. If you do, she
becomes a 1/1 blue and black Assassin named
Ranni, of the Black Knives with hexproof
until end of turn.
Whenever Ranni deals combat damage to a player,
connive 2.
"I stole Death long ago, and search now for the
dark path."