Gríma Wormtongue — ruling 1

Spells and abilities that cause opponents to gain life still resolve while Gríma Wormtongue is on the battlefield. No opponent will gain life, but any other effects of that spell or ability will still happen.

Gríma Wormtongue — ruling 2

If an effect says to set an opponent's life total to a number that's higher than the opponent's current life total while Gríma Wormtongue is on the battlefield, the player's life total doesn't change.

Gríma Wormtongue — ruling 3

Gríma Wormtongue's activated ability checks whether the sacrificed creature was legendary as it last existed on the battlefield. It doesn't matter whether or not it's legendary in the graveyard.

Gríma Wormtongue — ruling 4

Amass abilities are now written as "amass [subtype] N." Previous cards with amass have received errata to say "amass Zombies N."

Gríma Wormtongue — ruling 5

To amass Orcs N, if you don't control an Army creature, create a 0/0 black Orc Army creature token. Then you choose an Army creature you control and put N +1/+1 counters on it. If that Army isn't already an Orc, it becomes an Orc in addition to its other types.

Gríma Wormtongue — ruling 6

Amass Zombies works the same way, except you create a 0/0 black Zombie Army creature token if you don't control an Army. If the Army creature you chose isn't already a Zombie, it becomes a Zombie in addition to its other types. By combining cards with amass Orcs and amass Zombies, you can end up with an Orc Zombie Army.

Gríma Wormtongue — ruling 7

In the rare case that you control multiple Army creatures (perhaps because you played a creature with changeling) while you amass Orcs, you choose which of your Army creatures to put the +1/+1 counters on. If that creature isn't an Orc, it becomes an Orc in addition to its other types.

Gríma Wormtongue — ruling 8

If you don't control an Army, the Orc Army token you create enters the battlefield as a 0/0 creature before receiving counters. Any abilities that trigger when a creature with a certain power enters the battlefield, such as that of Mentor of the Meek, will see the token enter as a 0/0 creature before it gets +1/+1 counters.

Gríma Wormtongue : règles, fonctionnement et interactions (MTG)

Gríma Wormtongue 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

Your opponents can't gain life. , Sacrifice another creature: Target player loses 1 life. If the sacrificed creature was legendary, amass Orcs 2.

How it works : Gríma Wormtongue

Original English text — Wizards of the Coast / Scryfall

#1June 16, 2023· Wizards of the Coast
Spells and abilities that cause opponents to gain life still resolve while Gríma Wormtongue is on the battlefield. No opponent will gain life, but any other effects of that spell or ability will still happen.
No other card is named in this ruling.
#2June 16, 2023· Wizards of the Coast
If an effect says to set an opponent's life total to a number that's higher than the opponent's current life total while Gríma Wormtongue is on the battlefield, the player's life total doesn't change.
No other card is named in this ruling.
#3June 16, 2023· Wizards of the Coast
Gríma Wormtongue's activated ability checks whether the sacrificed creature was legendary as it last existed on the battlefield. It doesn't matter whether or not it's legendary in the graveyard.
No other card is named in this ruling.
#4June 16, 2023· Wizards of the Coast
Amass abilities are now written as "amass [subtype] N." Previous cards with amass have received errata to say "amass Zombies N."
No other card is named in this ruling.
#5June 16, 2023· Wizards of the Coast
To amass Orcs N, if you don't control an Army creature, create a 0/0 black Orc Army creature token. Then you choose an Army creature you control and put N +1/+1 counters on it. If that Army isn't already an Orc, it becomes an Orc in addition to its other types.
Card named in this ruling
Orc Army
#6June 16, 2023· Wizards of the Coast
Amass Zombies works the same way, except you create a 0/0 black Zombie Army creature token if you don't control an Army. If the Army creature you chose isn't already a Zombie, it becomes a Zombie in addition to its other types. By combining cards with amass Orcs and amass Zombies, you can end up with an Orc Zombie Army.
No other card is named in this ruling.
#7June 16, 2023· Wizards of the Coast
In the rare case that you control multiple Army creatures (perhaps because you played a creature with changeling) while you amass Orcs, you choose which of your Army creatures to put the +1/+1 counters on. If that creature isn't an Orc, it becomes an Orc in addition to its other types.
No other card is named in this ruling.
#8June 16, 2023· Wizards of the Coast
If you don't control an Army, the Orc Army token you create enters the battlefield as a 0/0 creature before receiving counters. Any abilities that trigger when a creature with a certain power enters the battlefield, such as that of Mentor of the Meek, will see the token enter as a 0/0 creature before it gets +1/+1 counters.
Card named in this ruling
Orc Army
#9June 16, 2023· Wizards of the Coast
Some spells and abilities that amass Orcs may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. You won't amass Orcs.
No other card is named in this ruling.
#10June 16, 2023· Wizards of the Coast
Some cards refer to the "amassed Army." That means the Army creature you chose to receive counters, even if no counters were placed on it for some reason.
No other card is named in this ruling.