User blog:XEverblue/Super Necrodragon Lunarzberg Destruction Paradox oO

Lately i had a Duel with my Zombiedragon Deck,

( look it up and comment or vote on it on tradecardsonline. user: everblue )

the situation given was :

Me: (it was my turn)
 * Battle Zone: Super Necrodragon Lunarzberg
 * Hand :          Necrodragon Abayo Shabayo | Codename Yabasgil Skill
 * Graveyard : Zekouchou

Enemy:
 * Battle Zone: Storm Kaiser Double Cross, Temporal Kamikaze ( <-- TAPPED )  | Eagle Aini (untapped)

My move: then at the same time two effects of the Put creatures trigger: ____________________
 * I attacked Storm Kaiser Double Cross, Temporal Kamikaze with my Super necrodragon Lunarzberg so he dies and i can Summon Codename Yabasgil Skill and Necrodragon Abayo Shabayo
 * Codename Yabasgil Skill: I take Zekouchou into my hand to choose an enemy creature with cost 6 or less
 * Necrodragon Abayo Shabayo: I destroy himself so my enemy has to choose a creature of himself to destroy

The problem now is, who has the right to choose first. ME or my Opponent.

If i can choose Eagle Aini first, he has to choose Storm Kaiser Double Cross, Temporal Kamikaze, but if he can choose first he would obviously also choose Eagle Aini so i cannot choose a creature with a cost of 6 or less anymore so the effect of Codename Yabasgil Skill vanishes.

So Do I get the Advantage because its my combo, or do the two Opponents somehow  have to gamble for the first Choice.

PLS HELP :D