Cheapest priced copy (Kamigawa: Neon Dynasty): $0.35 at Card Kingdom, near mint, their price list as of .
Historian's Wisdom 
Enchantment — Aura · Uncommon · Kamigawa: Neon Dynasty · #192
Enchant artifact or creature
When this Aura enters, if enchanted permanent is a creature with the greatest power among creatures on the battlefield, draw a card.
As long as enchanted permanent is a creature, it gets +2/+1.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kamigawa: Neon Dynasty | 192 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 18 February 2022Historian's Wisdom has an intervening "if" clause in its triggered ability. This means that you will draw a card only if the enchanted permanent is a creature with the greatest power both at the time the ability triggers and at the time that it resolves.
- 18 February 2022If the enchanted creature leaves the battlefield in response to the triggered ability but the Aura is still on the battlefield, the Aura will be put into its owner's graveyard as a state-based action. In that case, the last time it was on the battlefield, it wasn't enchanting a permanent, and its controller will not draw a card.