nemoma

Currently, there are 9 kinds of Custom Jewels on our server, each has a different name and effect. Here we'll list all of them.
Notice ALL but 1 of these Jewels can only be bought using Phantasm Celestial Points (PCPoints for short).

Name	Requirement	Success Rate	Effect	Penalty (If Fail)
Soul Of Eternal	Item Level at least +5.	75%	Item Level +2	Item Level -2
Soul Of Miracle	N/A	80%	+Luck&Skill, Level+1	-Luck&Skill, Level-1
Soul Of Godsend	Need Luck	60%	Item become Ancient (If able) Socket+1 (If Able)	Item Destroyed
Soul Of Hope	Need Luck	65%	Add some Exe Options	??????
Soul Of Stars	Need Luck	65%	Add some Exe Options	??????
Soul Of Refrain	N/A	65%	Item become Full Option	??????
Soul of Angel	Item at most +7, Need Luck	70%	Item Level +7	??????
Soul Of Salvation	N/A	50%	Item get Full Exe Option	??????
Soul Of Clover	Item at least +7	15%	??????	??????

The Items can be bought from merchant NPC @ Devias 204,9.

nemoma

Oh, you say that I didn't list all the penalties?
Well, you're going to find them out yourself.

Don't worry, the 15% jewel won't break your item, I'll bet my Owner status at that.

Also, this is some random info that you may want to knowXD.

Jewel Name	Description Refers to
Soul of Eternal	Misao Ohihara from ONE
Soul of Miracle	Ayu Tsukimiya from Kanon
Soul of Godsend	Kannabi no Mikoto from AIR
Soul of Hope	Ushio Okazaki from CLANNAD
Soul of Stars	Yumemi Hoshino*1 from Planetarian
Soul of Refrain	Riki Naoi from Little Busters
Soul of Angel	Kanade Tachibana*2 from Angel Beats
Soul of Salvation	Kagari from Rewrite
Soul of Clover	Random Number God

Note:
1. Known as Reverie in the English Patch.
2. Known as Tenshi (Angel) initially in the anime.

All of those aside from Angel and Clover came from VisualArt's/Key's games, which I'm a huge fan of. Angel Beats is also work by Key, but it's an anime.