Argostars - Slayer Eteo

Warrior monsters you control cannot be destroyed by card effects. Once per turn, when your opponent activates a card or effect: You can Special Summon this card as an Effect Monster (Warrior/LIGHT/Level 4/ATK 800/DEF 800) with the following effect (it is also still a Trap), then, if you have any banished "Argostars" monster(s), you can return 1 card on the field to the hand.
●Once per turn (Quick Effect): You can place this card in your Spell & Trap Zone face-up.