Bria, Riptide Rogue

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until the end of turn.)

Other Creatures you control have prowess.
(If a creature has multiple triggers of prowess, each trigger separately.)

Whenever you cast a noncreature spell, target creature you control can't be blocked this turn.

Use Aqua Tail! -Ash Ketchum