Mormegil vs other antimagic

[KesTheHammer]

So out of curiosity, I browsed through a_info.txt.

Mormegil uses the Antimagic_50 flag, while other high level artifacts(such as Grond) uses the no_magic flag

What is the difference?

Mormegil's description is as follow:

# The Dark Sword 'Mormegil'

N:78:'Mormegil'
I:23:33:2
W:30:15:250:0
P:0:6d7:0:0:-20
F:SPEED | IM_FIRE | RES_FIRE | BRAND_FIRE | RES_DISEN | RES_FEAR |
F:AGGRAVATE | CURSED | HEAVY_CURSE | SHOW_MODS | LEVELS | TY_CURSE |
F:BLOWS | SLAY_DRAGON | RES_CHAOS | ANTIMAGIC_50 |
FRAIN_MANA | DRAIN_HP | DRAIN_EXP
D:A foul, twisted sword with blackened spines and knobs, whose very name is a
D:curse upon the lips of Elves and Men.

# The Mighty Hammer 'Grond'

N:111:'Grond'
I:21:50:2
W:100:1:1000:500000
P:0:9d9:25:25:10
F:KILL_DRAGON | SLAY_ANIMAL | SLAY_EVIL | IMPACT | KILL_UNDEAD | NO_MAGIC |
F:KILL_DEMON | SLAY_TROLL | SLAY_ORC | RES_ACID | RES_ELEC | RES_FIRE |
F:RES_COLD | SEE_INVIS | ESP_ALL | AGGRAVATE | SHOW_MODS | INSTA_ART |
F:LEVELS | ACTIVATE | SPECIAL_GENE
F:MUST2H
f:MUST2H
a:HARDCORE=GROND
D:The mighty Hammer of the Underworld, blackened by doomspells of shattering,
D:whose wielder holds the lives of all Morgoth's servants in his hand.

[Yottle]

Antimagic prevents you from doing magic but it also stops magic attacks on you. I think it is only available from Dark Swords.

NO_MAGIC is the flag that prevents you from doing magic but AFAIK doesn't provide any protection from attacks. This is found on Amulets of Anti-Magic.

[KesTheHammer]

That makes sense. So grond only prevents you from doing magic.

[fiery_mews]

NO_MAGIC also gives you 95% saving throw IIRC.

[AnonymousHero]

fiery_mews is correct, it grants a 95% saving throw. (Or better? Can't recall.)