Dark Dabbling — ruling 1

If 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.

Dark Dabbling — ruling 2

Dark 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.

Dark Dabbling — ruling 3

Dark 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.

Dark Dabbling — ruling 4

You draw a card as Dark Dabbling resolves, not as the creature actually regenerates.

Dark Dabbling — ruling 5

Check 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.

Dark Dabbling : règles, fonctionnement et interactions (MTG)

Dark Dabbling is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

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.

How it works : Dark Dabbling

Original English text — Wizards of the Coast / Scryfall

#1December 7, 2018· Wizards of the Coast
If 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.
No other card is named in this ruling.
#2December 7, 2018· Wizards of the Coast
Dark 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.
No other card is named in this ruling.
#3December 7, 2018· Wizards of the Coast
Dark 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.
No other card is named in this ruling.
#4June 22, 2015· Wizards of the Coast
You draw a card as Dark Dabbling resolves, not as the creature actually regenerates.
No other card is named in this ruling.
#5June 22, 2015· Wizards of the Coast
Check 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.
No other card is named in this ruling.