Lady Bernice Trotter

Oathbound (Whenever this creature is dealt combat
damage by a creature, you may swear this creature
against that creature.)
Whenever Lady Bernice Trotter attacks, attacking
red creatures get +2/+0 and attacking white
creatures get +0/+2 until end of turn.
"If you think you even stand a chance, you'll soon find
out how wrong you are."