Uchbenbak's Descend only works if it's on the Field already

Edgar

Uchbenbak, the Great Mistake's ability (Descend 6: at the start of your turn, return it to the battlefield, then reinforce it) does not trigger unless it's already on your field. The ability to revive, after a lengthy investment (Descend level 6), feels like it shouldn't require another copy to get out.

I witnessed this in the Hydra event, with Sugar Coat, which also has a start of turn effect, in case it's overriding Uchbenbak's trigger.

I do not know if multiple copies of Uchbenbak in the grave will re-enter. I could see that being a problem to pull 120 damage (10 copies, after reinforcements) out of your graveyard with very little interaction from your opponent, but then, they'd enter with summoning sickness.