Your search for "Gladiator Proving Ground RYMP-EN110" revealed the following:
Gladiator Proving Ground - RYMP-EN110 - Ultra Rare - 1st Edition from Ra Yellow Mega Pack 1st Edition, available at 401 Games Canada. Rarity: Ultra Rare Card Text:Add 1 Level 4 or lower "Gladiator Beast" monster from your Deck to...
Gladiator Proving Ground - RYMP-EN110 - Ultra Rare - Unlimited from Ra Yellow Mega Pack Unlimited, available at 401 Games Canada. Rarity: Ultra Rare Card Text:Add 1 Level 4 or lower "Gladiator Beast" monster from your Deck to your hand....