Silverquill Lecturer is a rare Creature — Kor Wizard card from Modern Horizons 3 Commander (M3C), collector number 96. Current market price: $0.35, TCGplayer market prices via Scryfall.
Creature spells you cast have demonstrate. (Whenever you cast a creature spell, you may copy it. If you do, choose an opponent to also copy it. Each copy becomes a token.)