Pathros's Iceborn

Pathros's Iceborn enters the battlefield with X
+1/+1 counters on it.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Pathros's Iceborn enters the battlefield, tap target creature. It doesn't untap during it's controllers next untap step.
A spawn of the monster of the Darkness, It embodies
the terror of a frozen end