So I've never noticed Death's Dance was a sword. Also, it has eyes. Darkin perhaps?
Clearly it has eyes and there is no lore for this item (and most of the items, please expand item lore Riot.). Any chance this will be explored upon in the future?

Clearly it has eyes and there is no lore for this item (and most of the items, please expand item lore Riot.). Any chance this will be explored upon in the future?

Hate being the anti-fun police but nah it's not a offical Darkin. Narrative devs have never really intended for the in-game items to have canonical counterparts.
Although the art department for in-game assets tend to be inspired by aesthetics from Runeterra and the established world-building. Ranking and leveling badges, art for items, Hextech crafting, background art for Runes and for a lot of promotional content too. It's a visual language thing- helps players understand what they're looking at if its familiar to them. A deliberate thing simply for maintaining the recognizability of the IP.
Theres no Darkin called "Runaan" either.
Nah, its a Shushu.
from the icon in the game, I always thought it was a feather