In terms of reprint value, Sword of Truth and Justice is doing a lot of the heavy lifting at $35, but even then Umezawa's Jitte is around $15
Like most Magic: The Gathering cards, the value of Diamond Weapon depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy)
Robin Hood Sneaky Sleuth and Shenzi Head Hyena serve to gain plenty of Lore for similar reasons
Its worded as 1 or more, so you dont get it when you heal a character without damage to heal
Put a shield counter on target creature
That seemingly sound logic doesnt appear to be applying to the regular Final Fantasy Universes Beyond set either, at least not yet