Artkinband

The Artkinband is the symbol of the Heir of Artkin, imbued with ice magic.

Description
The ring is a mithril ring set with a large, icy blue gem. It is unnaturally cold to the touch.

Qualities
When first worn, the ring is automatically attuned. When worn, the ring would slowly turn the wielder to ice, decreasing their Constitution modifier by 1 every long rest. Every two long rests, the wielder takes their player level x their Constitution modifier in Cold damage, and their hit point maximum is reduced by the same number. When worn by the true heir of Artkin, the curse is negated. The user may cast Ice Knife and Snilloc's Snowball Swarm as 3rd level spells using Constitution as their spellcasting ability, at wiill.

Lore
The Artkinband is the symbol of the heir to Kingdom of Eregalia, a client state of the Elvish Empire. Five hundred years before the start of the campaign, Artkin Iceaxe declared independence for the humans in the north of Sovenia, around the Bay of Kings. He had a ring created from the essence of a fallen Winter God, cursing it to slowly kill any other than the true heir of his kingdom. With its power restored, the ring was said to control fragments of the god's former power.