Koyori, Eccentric Analyst

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Magecraft — Whenever you cast or copy an
instant or sorcery spell, you may discard a card,
if you do, draw a card.
Whenever you discard a creature card, create a
1/1 colorless Construct artifact creature token
with decayed. (It can’t block. When it attacks, sacrifice it at end of combat.)