Moongrum, Carian Knight

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
As long as you've cast an instant or sorcery this
turn, Moongrum, Carian Knight has first strike.
Instant and sorcery spells you cast that target Moongrum, Carian Knight cost {1} less to cast.