Destiny Hero - Dasher (UTR) (POTD-EN017) - Power of the Duelist Unlimited

Once per turn, by Tributing 1 monster, this card gains 1000 ATK until the end of this turn. If this card attacks, it is changed to Defense Position at the end of the Battle Phase. While this card is in the Graveyard, one time only, when you draw a Monster Card during your Draw Phase you can show it to your opponent and Special Summon it.