Forum:Bottomless vs pegasus+ancient city

So lets say my opponent has 2 crystal beasts in their spell and trap card zone and one crystal beast on the field with ancient city rainbow ruins on the field. He summons pegasus and searches I chain the summon with a bottomless Does he search first and then can negate because of ancient city or does bottomless regain 2nd chain and remove before he sets the monster in the spell and trap card zone? Kaythanxbai! xP