Dogmatika Fleurdelis, the Knighted (Secret Rare) [ROTD-EN008-SeR]

During the Main Phase, if a monster Special Summoned from the Extra Deck is on the field (Quick Effect): You can Special Summon this card from your hand, then, if you control another "Dogmatika" monster, you can negate the effects of 1 face-up monster on the field, until the end of this turn. When your "Dogmatika" monster declares an attack: You can make all "Dogmatika" monsters you currently control gain 500 ATK. You can only use each effect of "Dogmatika Fleurdelis, the Knighted" once per turn.