Once per turn, if this card is in Attack Position: You can discard 1 "Heroic" card; Special Summon 1 "Heroic" monster from your Deck, and if you do, change this card to Defense Position, also you cannot Special Summon monsters for the rest of this turn, except "Heroic" monsters. When you take damage while this card is in your GY: You can Special Summon this card in Attack Position. You can only use this effect of "Heroic Challenger - Thousand Blades" once per turn.