The Collector is a mythic Legendary Creature — Human Gamer card from Unknown Event (UNK), collector number MZ99. Current market price: $49.98, TCGplayer market prices via Scryfall.
Whenever you cast a signed spell or play a signed land, copy it. (A signed card is a card signed by its artist, designer, or someone else it's strongly associated with.) Discard a signed card: Destroy target creature with a name that has a five or fewer letter length difference from the person who signed the discarded card.