Tristan, Harbinger of all Good

First Strike, Flying.
All Horses have Vigilance.
Pegasi and Unicorns are Horses in addition to
their other creature types.
Horses with First Strike or Flying are Unicorns
or Pegasi respectively in addition to their other
creature types.
{1}{w}: Put a First Strike or Flying Counter on
Target Horse.
{1}{g}{g}: All Horses get +2/+2 and Trample
until end of turn.