Brown Horse

{1}{w}{w}{w}{w}: tap another creature you control
without a +1/+1 counter. tap it. brown
horse gains +x/+x until end of turn, where x is
that target creatures toughness +1. if it's a
knight, brown horse gains +0/+1 until end of
turn.
{2}{w}{w}{t}: target creature gains +1/+2 and
trample until end of turn.