Your search for "Mask Change AP01-EN011" revealed the following:
Mask Change - AP01-EN011 - Super Rare - Unlimited from Astral Pack 1, available at 401 Games Canada. Rarity: Super Rare Card Text:Target 1 face-up "HERO" monster you control; send it to the Graveyard, then Special Summon 1 "Masked HERO"...