Forum:About Stardust Assault mode

Hello, During this duel i had out Stardust assault mod and my opponent had Odin, Father of Aesir. I managed to destroy it with mirror force. AT the end phase he tried to bring back Odin's with it's eff, then i negated it with stardust assault. Then he used Odin's eff again

SO which goes first, does my Stardust assault mode return from the grave so i can negate Odin from coming back again or can he summon Odin from the grave before my stardust assault comes back to the field to negate?