4fd932d3_onsters___Yu_Gi_Oh__Card_Guide__Card_Text
[Card Name] Galaxy Knight [Type] Effect Monster [Attribute] LIGHT [Sub Type] Warrior [ATK] 2800 [DEF] 2600 [Card Text] 
If you control a "Photon" or "Galaxy" monster, you can Normal Summon this card without Tributing. When you do: Target 1 "Galaxy-Eyes Photon Dragon" in your Graveyard (if possible); regardless, this card loses 1000 ATK, and if it does, Special Summon that target (if any) in face-up Defense Position. This ATK decrease lasts until the End Phase.
Yu-Gi-Oh! Level 8 Monsters - Yu-Gi-Oh! Card Guide
Card Text