Herald of the Old Guard

Flying, Haste.
Soldier creature spells you cast gain Amplify 1. (As
a creature with Amplify 1 enters the battlefield, put a
+1/+1 counter on it for each card you reveal in your
hand that shares a creature type with it.)
Each legendary creature spell you cast has dash. The
dash cost is equal to its mana cost. (When you cast a
spell for its dash cost, it gains haste, and it's returned
from the battlefield to its owner's hand at the
beginning of the next end step.)