Long List of the Ents
scryfall.com
{G} • Enchantment — Saga • (As this Saga enters and after your draw step, add a lore counter. Sacrifice after VI.) I, II, III, IV, V, VI — Note a creature type that hasn't been noted for Long List of the Ents. When you cast your next creature spell of that type this turn, that creature enters the battlefield with an additional +1/+1 counter on it. • The Lord of the Rings: Tales of Middle-earth (LTR) #174 • Illustrated by Logan Feliciano • Magic: The Gathering, MTG

Newbie question, but suppose more than one player has a copy of [[Long List of the Ents]] on the battlefield. Can you note a creature type that has already been noted by an opponent?