Destiny HERO - Dasher (SGX1-ENB05) [Speed Duel GX: Duel Academy Box]

Once per turn: You can Tribute 1 other monster; this card gains 1000 ATK until the end of this turn. If this card attacks, change it to Defense Position at the end of the Battle Phase. Once, while this card is in your GY, when you draw a monster during your Draw Phase: You can reveal it; Special Summon it. This card must be in the GY to activate and to resolve this effect.