The Tetron: made up of four pieces each of which has their own abilities, this artifact can be assembled for ultimate power.
To make a tetron piece, just craft it's gem and put it in a core containment unit with a cell underneath, you can then harness it.
WARNING: Do not drop the gems on the ground, it is bad for your health.
The Tetron of Might: grants strength and has a passive aoe zombie killer, has high attack damage.
The Tetron of Resolve: Can be used to gain powerful buffs for a minute with a long cooldown.
The Tetron of Spirit: Increases movement speed and can be used to gain a temporary spirit form. allows freezing of mobs/players.
The Tetron of Lore (WIP): gives night vision and has an unfinished GUI.
The Tetron: Grants a plethora of status effects and can one-shot most mobs. Right-click to kill everything.