Yugioh Rush Duel [RD/SJMP-JP018] Voidvelgr Transi (Normal Parallel Rare)

[REQUIREMENT]

During your Main Phase that you Normal or Special Summoned this card.

[EFFECT]

Destroy all face-up Normal Monsters on the field. Then, this card gains ATK equal to [the number of monsters destroyed by this effect] x 300 until the end of this turn. This turn, you can only attack with this card.