Scion of the Highlands

Whenever you reveal Scion of the Highlands while clashing you may cast it as if it had flash, it costs {5} less.
Whenever you clash and win, put a +1/+1 counter of Scion of the Highlands.
Whenever one or more creatures you control attack, clash with target opponent. If you win, creatures you control get +3/+3 until end of turn.