Did you purposely omit the entire tooltip of the spell?
https://www.wowhead.com/spell=49039/lichborneLichborne
Instant 2 min cooldown
Requires Death Knight
Requires level 33
Draw upon unholy energy to become Undead for 10 sec, increasing Leech by 10%, and making you immune to Charm, Fear, and Sleep.
The tooltip says they become undead.
I'm not being reductive at all. The main aspect of Primordial Wave is this;Death Coil does not replicate abilities used on the target, they serve a completely different function, Primordial Wave facilitates AOE healing/damage using normally single target abilities such as healing wave, lightning bolt, lava surge.
Once again you're being as reductive as possible in order to make a concept you personally don't like seem as unviable as possible, which is hilarious given others can be just as reductive as possible and say your entire "Turret system" is a upgradable searing totem.
That's all there really is to the spell. The rest of it is Shaman-specific stuff. The core of the spell is using one spell to either deal damage to enemies or healing allies. It's the same concept as Death Coil.Blast your target with a Primordial Wave, dealing Shadow damage to an enemy, or heal an ally
I didn't make the Necromancer class unviable, Blizzard did.
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If you're saying that Mages will get the ability to turn into Skeletal mages after Shadowlands is over, you're sadly mistaken. The only reason Mages have that ability is because we're in a Necromancy/Death-themed expansion. If the next expansion is Dragons, Mages aren't going to have the ability to turn into skeletal Mages.
We're talking about Necromancer abilities that use Necromancy. Again, the issue is that the DK class can absorb any ability thought up for a Necromancer class, yes even abilities designed for a caster since the DK also utilizes ranged magical spells. This is by design, so you attempting to create a distinction between melee and caster mechanics when we're dealing with a class that utilizes both is a bit silly.If we're talking 'Necromancer abilities' as in abilities that suit a Necromantic Spellcaster class, then we're talking about different mechanics from a Death Knight who is solely designed for melee gameplay.
If you're not talking about mechanics and only talking about individual abilities, then what is the point? We already know that any class can be given any abilities. That's why Mages have a spell that turns them into a Skeletal Mage right now.
And no, EVERY class cannot be given any Necromancer ability. The only class that can is the DK class because it is so thematically similar to the Necromancer.