F.A. Whip Crosser (CIBR-EN086) - Circuit Break Unlimited

Gains ATK equal to its Level x 300. Your opponent must pay 300 LP to activate the effect of a monster whose original Level/Rank is lower than this card's Level. Each time a "F.A." Spell/Trap Card or effect is activated: You can increase this card's Level by 1. If this card is Level 7 or higher, your opponent cannot discard or send cards from their hand to the GY to activate a card effect.