Here ya go Rooster~!

[RustyMetal]

Isn't cosmic eludaition or whatever supposed to be the lvl 4?

Thats the SC Tenzen used on you in the PM mission. As of now, when you do a light SC, then add the relic WS it will create another light SC

x does Shark bite
x does Crossreaper
Skillchain: Light
x does Crontach
Skillchain: Light

But i guess eatch relic ws has a base, like the scythe is drk based so it wouldent create the 2ed light, would only work on dark sc. But yeah, what happens when you do a drk based weapon with a light based weapon? Not known yet, but theres only one way to find out

[Shinryuu]

Also, it seems a mean SE trick to me to enable this level 4 SC with relic #5 only! So no playing in Dynamis, since #4 is way easier to get than #5.

Also, are there BG members with a leveled Relic Weapon?

[rooster]

22 has lvl 3 gun.