Ring of the Arcane Berserker

This dark silver ring is decorated by a metallic skull with an amethyst gemstone embedded in its forehead. While wearing the ring, you can use an action to cast the chill touch spell (+5 to hit with ranged spell attack) from it. This ring has 3 charges and regains 1d3 expended charges daily at dawn. While wearing it, you can cast a spell even if you're raging by expending 1 of the ring's charges as part of casting the spell. If you do, your rage does not end at the end of your turn as a result of not attacking a hostile creature. In addition, you can concentrate on spells while raging, but have disadvantage on Constitution saving throws to maintain your concentration on them when you take damage.