Talk:Orokin Catalyst/@comment-94.169.25.201-20130401182728/@comment-74.103.148.62-20130408235840

You can't add more then one.

The Effects stack based on level, so each level is doubled. It doesn't matter when you apply it, it always doubles your weapons current level, even when you level up: if you put it on a Level 13 cronus, you would have 26: leveling it up will also give 1 extra mod to 28 and so on.

It doubles your mod capacity on that weapon.