So we're getting 2 more psuedo-arcanas, an Earthshaker totem with custom spell effects, particles and ability icons, and an Abaddon sword with custom spell effects and ability icons. Much like the Pudge set before, the backpack icons are actually from the loading screen, not a "regular" picture. (They also come with a set, but it's the Totem and Sword that hold the modifications, like Pudge's beard). For some reason both are a dollar cheaper than the Pudge set... but whatever.
I think we kind of need a rarity above Legendary that's for items like these. Not quite Arcana, but bigger and better than Legendary.
Ancient's been sitting around unused for awhile. Seems like this would be a good spot to put them at. Basically set it so Ancient items are items that change spell icons and many animations, so these items don't awkwardly hang out with a Kotl staff with a neat particle, two ember hats that do nothing, and a few mounts and summons which are jarringly less of items than these.
On a related note, I can't buy the Abaddon set because the majority of the cool stuff is on the sword and I already have a fully decked out Mace with gems. But I do plan on getting the ES set, supports don't usually get cool stuff like this often.