Tanar, Steed of the Plateau

Whenever you gain life, you may pay {w} to create
a 1/1 Horse creature token.
Horse creatures you control get +1/+1 for
each other Horse you control.

"He's always on the run, chased by hecklers to the
edge of the steep stone palisades. Yet evasive and
cunning, he navigates his way in the morning mists
to evade his pursuers, disappearing into a bright
and blinding morning horizon."