Does the Avatar of Death make “attacks” for the purposes of resistance or immunity?

The Avatar of Death is an undead summoned by one of the bad cards in the Deck of Many Things.

It has the Reaping Scythe action as its only way to deal damage to other creatures, and it has no feature to make its attacks magical or silvered.

Reaping Scythe. The avatar sweeps its spectral scythe through a creature within 5 feet of it, dealing 7 (1d8 + 3) slashing damage plus 4 (1d8) necrotic damage.

If a Werewolf (which is immune to slashing damage from nonmagical, nonsilvered attacks) is targeted, does it take 11 damage or only the 4 necrotic?

Alternatively, if a Black Pudding (which is immune to slashing) is targeted, does it take 11 damage or only the 4 necrotic?

Barring Epic Boons, is there a way to gain immunity to fire damage?

Is there a way, barring Epic Boons, for a player character to gain full immunity to fire damage. I know it’s easy to gain resistance by, for example, being a tiefling or casting a spell that grants resistance. But I’m looking for full immunity. The lower the level at which it can be accomplished the better.

Is there any written RAW definition for ‘Immunity’ in the Source Books?

When reading stat blocks in the Monster Manual there’s once in a while a mention of monsters having immunity to certain damage types.

While the natural language understanding of that is certainly clear, I could never find a written definition akin to those for resistance, vulnerability, etc.

Is there any RAW definition for immunity in the source books?

Unable to Overwrite EIP in Immunity

Though there are answers for questions with same topics this issue has not been addressed before. Iv gone through those posts as well

Im trying to learn about exploit writing. Im a beginner. However I cannot observe my program overwriting EIP

Im writing a .asx file in Perl and loading it into mp3 converter. However if I manually execute the application the file is created and app crashes. But in Immunity Debugger I dont see EIP being overwriten is x41x41..

Could this be because Im executing (on Windows 10 host) and there is Microsoft Compiler Protection?

What could be other possible reasons?

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Code

#!C:\Perl64\bin my $  file= "fuzz_file.asx"; my $  junk= "http://"."\x41" x 50000;  open($  FILE,">$  file"); print $  FILE "$  junk"; close($  FILE); print "asx File Created successfully\n"; 

Does immunity to fear prevent a mummy’s Dreadful Glare from paralyzing a character?

A Mummy has an ability called Dreadful Glare:

The mummy targets one creature it can see within 60 feet of it. If the target can see the mummy, it must succeed on a DC 11 Wisdom saving throw against this magic or become frightened until the end of the mummy’s next turn. If the target fails the saving throw by 5 or more, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of all mummies (but not mummy lords) for the next 24 hours.

The Berserker Barbarian has the Mindless Rage feature:

Beginning at 6th level, you can’t be charmed or frightened while raging. If you are charmed or frightened when you enter your rage, the effect is suspended for the duration of the rage.

Say a Mummy uses its Dreadful Glare action on a Barbarian who is currently raging and has the Mindless Rage feature. What happens if the Barbarian fails their save by 5 or more? Does the Barbarian become paralyzed because they failed their save so badly? Or are they unaffected because they are immune to fear and the two conditions must be applied together?

Booming Blade or Green Flame Blade: Utility against creatures with immunity to non-magical damage?

Both Booming Blade and Green Flame Blade have the following text:

You make a single melee weapon attack against a creature you can see within the spell’s range. If the attack hits…

Reading this question makes me believe that a weapon which has been magically enchanted or enhanced, even temporarily, would overcome this immunity, and that both base weapon damage and cantrip damage would apply on a hit (and double on a critical hit).

Question: What damage, if any, would be generated by attacking a creature (with immunity to damage from non-magical weapons) with a non-magical weapon as part of a Booming Blade or Green Flame Blade attack?

Does immunity to non magical damage negate sneak attack damage?

My party came across an encounter against a creature that is supposed to be immune to non-magical damage. This isn’t much of a problem for us, as we have magic weapons. But our rogue seems to be at a big disadvantage with their sneak attack damage.

If a player hits a creature that is immune to non-magical damage with a magical weapon, is the sneak attack damage still negated?