Rider 1, Living Legend

Other Soldier creatures you control get +0/+1.
You may exert Rider 1, Living Legend as it attacks. If you do, Soldier creatures you control Bolster 1 as they attack until end of turn.
Partner. If you control another Elemental Soldier Rider 1 gains "{2}{r}{g}, {t}: Destroy target nonland permanent."
"Rider...Henshin!!"