Sarph, Temur's Descendant

Berserk (Whenever you cast a human creature spell
you may pay {r/g}{g/u}. If you do that creature will enter
the battlefield tapped and will deal damage to target creature equal to half of that creatures power. If that creature is a dragon deal damage equal to double the creature's power instead)
Sarph, Temur's Descendant's power is equal to
the number of non-token creatures you control.
Other Humans you control have reach.