Your search for "Test Panther MP20-EN176" revealed the following:
Test Panther - MP20-EN176 - Super Rare - 1st Edition from 2020 Tin of Lost Memories 1st Edition, available at 401 Games Canada. Rarity: Super Rare Card Text:2 monsters including a "Gladiator Beast" monsterIf this card is Link Summoned: You...