Vicious Astraloud Secret Rare

"Visas Starfrost" + 1 monster with 1500 ATK/2100 DEF Must be Special Summoned (from your Extra Deck) by banishing the above cards from your field and/or GY. Cannot be destroyed by battle. If this card is Special Summoned: You can target 1 other monster on the field; destroy it, and if you do, this card gains ATK equal to half of that monster's original ATK or DEF (whichever is higher).