Engulfing Slagwurm — ruling 1

Engulfing Slagwurm’s ability triggers and resolves during the declare blockers step. Creatures destroyed this way will not deal combat damage.

Engulfing Slagwurm — ruling 2

If your Engulfing Slagwurm blocks or becomes blocked by multiple creatures, its ability triggers that many times. Each trigger will be associated with a specific creature. You choose which order to have the abilities resolve.

Engulfing Slagwurm — ruling 3

If Engulfing Slagwurm’s ability resolves and the other creature is not destroyed (perhaps because it has already left the battlefield or it regenerates), you’ll still gain life equal to that creature’s toughness.

Engulfing Slagwurm — ruling 4

As each ability resolves, the amount of life you gain is equal to the appropriate creature’s current toughness (if it’s somehow still on the battlefield), or its toughness as it last existed on the battlefield (in all other cases).

Engulfing Slagwurm — ruling 5

Even if the ability of an attacking Engulfing Slagwurm destroys each creature blocking it, Engulfing Slagwurm won’t deal combat damage to the player or planeswalker it’s attacking unless it somehow gains trample.

Engulfing Slagwurm : règles, fonctionnement et interactions (MTG)

Engulfing Slagwurm 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

Whenever this creature blocks or becomes blocked by a creature, destroy that creature. You gain life equal to that creature's toughness.

How it works : Engulfing Slagwurm

Original English text — Wizards of the Coast / Scryfall

#1January 1, 2011· Wizards of the Coast
Engulfing Slagwurm’s ability triggers and resolves during the declare blockers step. Creatures destroyed this way will not deal combat damage.
No other card is named in this ruling.
#2January 1, 2011· Wizards of the Coast
If your Engulfing Slagwurm blocks or becomes blocked by multiple creatures, its ability triggers that many times. Each trigger will be associated with a specific creature. You choose which order to have the abilities resolve.
No other card is named in this ruling.
#3January 1, 2011· Wizards of the Coast
If Engulfing Slagwurm’s ability resolves and the other creature is not destroyed (perhaps because it has already left the battlefield or it regenerates), you’ll still gain life equal to that creature’s toughness.
No other card is named in this ruling.
#4January 1, 2011· Wizards of the Coast
As each ability resolves, the amount of life you gain is equal to the appropriate creature’s current toughness (if it’s somehow still on the battlefield), or its toughness as it last existed on the battlefield (in all other cases).
No other card is named in this ruling.
#5January 1, 2011· Wizards of the Coast
Even if the ability of an attacking Engulfing Slagwurm destroys each creature blocking it, Engulfing Slagwurm won’t deal combat damage to the player or planeswalker it’s attacking unless it somehow gains trample.
No other card is named in this ruling.