Valkyrie des Ténèbres BP02-FR064

This card is treated as a Normal Monster while it is 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 make it become an Effect Monster with this effect. Once, while this card is face-up on the field, you can place 1 Spell Counter on it. This card gains 300 ATK for each Spell Counter on it. You can remove 1 Spell Counter from this card, then target 1 monster on the field; destroy that target.