Xin Zhao, Seneschal of Demacia

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Other creatures you control get +1/+1.
Whenever Xin Zhao, Seneschal of Demacia
attacks if four or more creatures are attacking, creatures you control gain prowess until end of
turn.
"The warrior's spirit is never broken."