Bellerophon, Shining Hero

Mount 4 (Tap any number of untapped creatures you control with total power 4 or greater: This creature becomes mounted until end of turn.)
As long as Bellerophon is mounted, it gains flying, first strike, and lifelink.
Whenever Bellerophon deals combat damage to a player, if it is mounted, destroy up to one target Chimera that player controls.