Trade Good

Very Rare Requires Attunement

A jagged chaotic rune that spreads out in all directions and flashes with angry red light.
 Passive Effect. When marked on an item, the attuned wearer can use their reaction to inflict 1d6 lightning damage on any creature within 30 feet of them that deals damage to them.
 Active Effect. While attuned to an item with this rune, you can use that item to cast chain lightning without expending spell points. Once activated, it can’t be activated again until the next dawn.