[EFFECT] You can choose 1 Galaxy Normal Monster in your GY and Special Summon it to your field face-up.
Then, the monster Special Summoned by this effect gains 800 ATK x [The number of monsters sent to the GY] until the end of the turn.
[REQUIREMENT] When your opponent Normal or Special Summons a monster, you can activate this
[EFFECT] Change up to 3 Galaxy Normal Monsters you control in Attack Position to face-up Defense Position
Then, all face-up Defense Position Monsters you control gain 500 DEF x [The number of Galaxy Normal Monsters you control] until the end of the turn
[EFFECT] Choose 1 DARK Galaxy monster in your GY and add it to the hand
[REQUIREMENT] If the only face-up monsters you control are DARK Galaxy monsters, when your opponent Normal or Special Summons a monster(s), you can activate this