التنين الأسود المتوهج أحمر العينين

This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is a Normal Monster on the field, you can Normal Summon it to have it become an Effect Monster with this effect.
● If damage calculation is performed involving this card, at the end of the Battle Phase: You can inflict damage to your opponent equal to this card's original ATK. You can only use this effect of "Red-Eyes Black Flare Dragon" once per turn.