Spectral Steed

Summon a ghostly horse that charges forward
until the end of the turn, knocking down (and
possibly back) the first enemy hit.
Caster may travel with the horse for the duration
of this spell.
"With this view, he steered his course onward; and
Rocinante, as if he had guessed the knight's intention,
began to move with such alacrity and nimbleness, that
his hooves scarcely seemed to touch the ground."