Deluge Virtuoso (SOS 42)

Creature — Human Wizard • Mana cost: {2}{U} • Secrets of Strixhaven • Common

When this creature enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Opus — Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn. If five or more mana was spent to cast that spell, this creature gets +2/+2 until end of turn instead.

Illustrated by Justine Cruz.