Hmm, I think I have one:
Omniverse Soul Shard - A crystalline catalyst made of pure mana that was found growing in the earth of the Tangled Green. Seems rare, but would you really sell it after feeling such raw power emiating from the shard? It could probably be used for a lot of things...
Effect: Tier One Powerups last through two battles. Power fades instantly upon use, so it's a one time only artifact.
(EDIT: Removed the SP cost so it's actually usable.)
Omniverse Soul Shard - A crystalline catalyst made of pure mana that was found growing in the earth of the Tangled Green. Seems rare, but would you really sell it after feeling such raw power emiating from the shard? It could probably be used for a lot of things...
Effect: Tier One Powerups last through two battles. Power fades instantly upon use, so it's a one time only artifact.
(EDIT: Removed the SP cost so it's actually usable.)