Almost at 100%, I miss just ONE thing ! please help me :) (spoiler)

[Kotaro]

SPOILER ALERT

Okay so, I just missed one chest on mount bloom... It's the last chest on the phasing mini-game, I really don't know how I can get it and I really need your help...

This is a screenchot from the place

thanks for your help !

(I hide my wapon and shield just in case XD)

 

[MrChocodemon]

See the left most upper mirror. The interface covers it a little. You can bounce that from further down.

 

[Kotaro]

See the left most upper mirror. The interface covers it a little. You can bounce that from further down.

TY MrChocodemon but I have already seen this mirror but I can't go there and I don't know how is it possible ...
Thanks for your reply and help however I'm going to tryhard to get the chest

 

[Kotaro]

Down !