أ/أ سيربيروس

[ Pendulum Effect ]
Once per turn: You can target 1 "D/D" monster you control; change its Level to 4, and if you do, it gains 400 ATK and DEF (even if this card leaves the field).

[ Monster Effect ]
When this card is Pendulum Summoned from the hand, while you control a "D/D" monster other than "D/D Cerberus": You can target 1 Continuous Spell Card in your Graveyard; add it to your hand.