Ring of Phantom Lightning

A ring that produces invisible lightning that is nearly impossible to evade. The only problem with the ring is that you as the user cannot see the lightning. Therefore it when it is used it will shoot in every direction. The only way around this is if you are wearing armor coated with a special wood that absorbs the electricity. The user still cannot wear metal at all of the lightning may melt it away. The ring has 3 charges. The lighting will do 3d12 +5 shock damage the first charge. The lightning does 2d12 +5  shock damage the second charge. and 1d12 shock damage the third charge. It needs one day to get one charge back. And three days to fully recharge.