User blog comment:Solchire/Viability of Umuru 3-Stop/@comment-25090143-20150122134859

Your deck idea seems like Hanayo-Ni-Kai sustain build. Which might be viable, but I think it's unlikely.

However Umuru itself suffers more the game drags on and with the current meta it makes that even worst so you might take that in considering before you try to build this deck even further. Not to mention you can't get a hand on Ancient Surprise.

I've tried level 4 Umuru with bear-plant wear tech + Inactivity in Lackey and I find it too much inconsistency so I kinda gave the idea. I haven't try white Umuru yet but I think bear-plant wear is more viable on the paper. I also plan on building blue-Umuru but I don't have time right now due to the personal reasons.

About your deck:
 * Don't play Cryskull, play the G1 Ancient Weapon that came with Iona's TD.
 * Play 2 Dead Splash, if you really want to play 3-stop defensive Umuru(which actually is not the point of playing 3-stop at all) without it your Umuru will got rape by all those Tamas.
 * You might consider running 4 Lost Technology and at least 2 Fracturing Lust

The whole point in playing 3-stop decks are to kill your opponent as fast as possible, not to try to keep up with late game decks. My ARTs for 3-stop deck is revolving around Charging, Salvage, Wake Up and one of either Idol Defense or Dead Splash(not counting Ancient Surprise since you said you can't get a hand on it). However, currenlty because the card I mention, Idol Defense, it makes 3-stop Umuru a no-go deck right now because you can't really do anything if you don't end your opponent in 1-2 turns after growing level 3.

TL;DR 3-stop Umuru is currently crap right now unless you find a way to survive at least 1-2 turns after your opponent Idol Defense your Final Turn or to come up with anything new and unique which is unlikely(no offense) with the current card pool.