Board Thread:Naruto Discussions/@comment-34700383-20180829185752/@comment-33485854-20180908063424

LegionZero wrote: Littlegen wrote: No he didn't. Quite literally one page later it shows Hagoromo getting the seals back and clapping his hands together and the planetoid forms around Kaguya

It did not work like that.

They initiated the technique and the seal activated before we're shown Hagoromo. Hagoromo even states he's about to work on bringing them back, ie summoning the past spirits.