Gunner's Stripling

Double strike
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Gunner's Stripling enters the battlefield, create a Treasure token. (It's an artifact with "{t}, Sacrifice this artifact: Add one mana of any color.")
"-Calm down, laddie! You'll soon swap those daggers for bigger concerns."