Eternal Galactica Oblivion

[ Galaxy / Fusion / Effect ] "Galactica Oblivion" + 2 LIGHT Attribute Galaxy Type monsters [REQUIREMENT]Shuffle 5 Galaxy Type monsters from your Graveyard into the Deck. [EFFECT] Send the top 3 cards of your Deck to the Graveyard. This turn, this card cannot be destroyed by your opponent's Trap Card effects. Then, you can make this card gain ATK equal to [the number of monsters in your Graveyard] x 300 until the end of this turn. ATK/ 3500 DEF/ 2500