Cheapest priced copy (Secrets of Strixhaven): $0.35 at Card Kingdom, near mint, their price list as of .
Primary Research 
Enchantment · Uncommon · Secrets of Strixhaven · #26
When this enchantment enters, return target nonland permanent card with mana value 3 or less from your graveyard to the battlefield.
At the beginning of your end step, if a card left your graveyard this turn, draw a card.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secrets of Strixhaven | 26 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 20 March 2026Primary Research's last ability will check as your end step starts to see if any cards have left your graveyard this turn. If none did, the ability won't trigger at all. It's not possible to remove cards from your graveyard during your end step in time to have the ability trigger.
- 20 March 2026If a card in a graveyard has {X} in its mana cost, X is 0 for the purpose of determining its mana value.