Not the most powerful

Kaiserpingvin said:
Yukari breaks down the boundary between losing and winning. She wins.

Yukari breaks down the boundary between being strongest and not being strongest. She is strongest.

Yukari dies. She manipulates the border between life and death. She lives again.

Yukari meets someone with power X which can defeat her. She makes a gap between the user of X and X. She then can hibernate in calm and quiet.

obvious winner is obvious.

Revillo_Phoenix said:
Well if you really think about it Yukari has the secound most hax power.
Normally no projectile would ever hit her if she would go all out. If you shoot at her she just needs to create a warp infront of her and your shoot will go in that and then the other side of the warp will be right behind you. So she basically would make you shoot yourself.
( Plus if she makes a gap betwean you're head and body...that is what you call instant death. :P )

The only power more hax then Yukaris is Sakuya. Time control. In stoped time you can do just about anything to you're enemy and he/she would not be able to defend and whats more won't even know what you did cuz even if you torture someone for a year in stoped time, after time starts flowing again the person will feal that torture as if it hapend in an instant.

I partialy base this comment on the fact that I'm a very experienced RPG story teller and I never sow any power more broken the dimension and time manipulation. Dimension manipulation can only be beaten by time manipulation if it's used right and time manipulation just can't be beaten except by stuff like " this special power won't work on me for no resune ".

The ability to manipulate boundaries is a terrifying ability capable of fundamentally undermining reality.As you know, everything is built upon the existence of boundaries. If there was no water surface, there could be no lake. If there was no sky line, neither mountain nor sky could exist. Were it not for the Great Barrier, even Gensokyo itself wouldn't exist. If there were no boundaries, everything would probably exist as a single enormous object. Thus, the ability to manipulate boundaries is an ability of logical creation and destruction. It essentially creates a new being, or denies the existence of a being. Among the abilities youkai are known to possess, this is one of the most dangerous, being comparable even to the power of gods. She is also capable of going anywhere through a gap in space, whether it be her entire body or only a part of her. It's said that this ability is not limited to physical space, but also applies to pictures, others' dreams, and even stories. In addition, she is possessed of superhuman intellect, and is especially good at mathematics. Furthermore, due to her long lifespan, she has a broad range of knowledge and experience.

It is said that she once invaded the moon by modifying the boundary between truth and lie and plunging into the mirrored moon on the lake's surface.

While Shikieiki's combat capacity is never directly referenced, at the conclusion of ZUN's "A Beautiful Flower Blooming Violet Every Sixty Years", Yukari Yakumo believes that herself, Yuyuko Saigyouji and Reimu Hakurei to be together "no match for" the Yama

Senoj8 said:
Quote from Touhou Wikia for Shikieiki Yamaxanadu