Cheapest priced copy (The List): $0.35 at Card Kingdom, near mint, their price list as of .
Sage's Reverie 
Enchantment — Aura · Uncommon · Commander 2018 · #72
Enchant creature
When this Aura enters, draw a card for each Aura you control that's attached to a creature.
Enchanted creature gets +1/+1 for each Aura you control that's attached to a creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $0.35 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2018 | 72 | Uncommon | $0.39 | — |
| Fate Reforged | 23 | Uncommon | $0.49 | $4.99 |
| Jumpstart 2022 | 58 | Uncommon | $2.29 | — |
| The List | C18-72 | Uncommon | $0.35 | — |
| Secrets of Strixhaven Commander | 165 | Uncommon | $0.39 | — |
| Wilds of Eldraine Commander | 73 | Uncommon | $0.39 | — |
2 rulings from Wizards of the Coast
- 24 November 2014An Aura doesn't necessarily need the enchant creature ability for the abilities of Sage's Reverie to count it. For example, an Aura with enchant permanent that's attached to a creature will count.
- 24 November 2014Count the number of Auras you control attached to creatures as the enters-the-battlefield ability resolves to determine how many cards to draw. This will include Sage's Reverie as long as it's still on the battlefield at that time.