Cheapest priced copy (Magic Origins): $0.35 at Card Kingdom, near mint, their price list as of .
Dark Dabbling 
Instant · Common · Magic Origins · #89
Regenerate target creature. Draw a card. (The next time the creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, also regenerate each other creature you control.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Magic Origins | 89 | Common | $0.35 | $0.49 |
| The List | ORI-89 | Common | $0.35 | — |
| Ultimate Masters | 91 | Common | $0.35 | $0.49 |
5 rulings from Wizards of the Coast
- 22 June 2015Check to see if there are two or more instant and/or sorcery cards in your graveyard as the spell resolves to determine whether the spell mastery ability applies. The spell itself won’t count because it’s still on the stack as you make this check.
- 22 June 2015You draw a card as Dark Dabbling resolves, not as the creature actually regenerates.
- 7 December 2018Dark Dabbling is still on the stack while you count the number of instant and/or sorcery cards in your graveyard. It doesn’t count itself.
- 7 December 2018If the target creature is an illegal target by the time Dark Dabbling tries to resolve, the ability doesn’t resolve. You don’t draw a card and no creatures are regenerated.
- 7 December 2018Dark Dabbling’s spell mastery ability is a normal spell effect, not a replacement effect. This means that if you replace drawing a card for Dark Dabbling’s effect with dredging a card from your graveyard, the cards put into your graveyard this way may enable the additional regeneration.