[Items/Skills Tiers]
[Worst to Greatest]:
(Courtesy of the Ancient Manipulator)
(Side comment: Summons are and always will be tools)
[Common]: The garbage of the garbage thrown by those silly commoners.
[Uncommon]: The tools of the somewhat rich.
[Rare]: The rather useful not-so-garbage of the nobles (if there are).
[Treasure]: The "could be considered a national treasure, but is not worth that much to the system."
[Mythical/Cursed]: The used unrecycled garbage of the Gods.
[Legend]: The "tier's called 'Legend,' but it's still practically the trash of the Gods."
[King]: The useful tier.
[Emperor]: The "it's called the 'Emperor' tier, but it's honestly too powerful for any emperor to get hold of."
[Sovereign]: The "same thing as above, but applied for sovereigns."
[World]: The sh*t that could break worlds.
[Universe]: The sh*t that could break universes.
[Divine]: The "technical garbage of those powerful Gods that are still used by them because they are still quite good tools that could destroy multiple universes at once."
[God]: The authentic overpowered sh*t that's used by those insanely powerful Gods that could potentially destroy, well, everything.
[Legacy]: Disgustingly overpowered (no idea why it's called 'Legacy' though).
[Origin]: No comment.