النافورة، البطل المقنّع

You can reveal this card in your hand; Special Summon 1 "HERO" monster from your hand in Defense Position. If this card is sent to the GY to activate a card effect, or by card effect: You can Set 1 "Mask Change" from your Deck or GY. You can only use each effect of "Masked HERO Fountain" once per turn.