Super necromancery! This really captures the tone of the game, I think. It's also super cinematic and well orchestrated.

Awesome work! I really like the Necromancer's Den. That was my favorite, however, there were a lot of auditory pops and clicks within the sound. Not sure if that was intentional or not, but it was there! The ambiance, though, felt spot on and similar to the feel I was also going for with this challenge (dark and gritty). 

The spellcast SFX was a bit too long for what I would typically think a cast would be (in terms of the tail). And the wall crumbling had a much lower fidelity (i.e. quality) compared to the other two and there was A LOT of reverb. I guess it depends on the setting cause it could definitely work in a cave setting! Awesome stuff overall :)

The SFX were all really long. 

I would use the wall crumbling in some sort of cutscene after a fight but I couldn't imagine it coming up multiple times during combat.  

The spell cast sounded very metallic and in-your-face. It would really depend on how frequently the sound is used in the game. If the player was casting spells every second or two  it would need to be toned down. 

The Den was good ambient background sounds to replace the music in a menu or something. There were a few pops that I wasn't sure was intentional.

Music: Your strings chords in the intro invokes Lord Of The Rings sound track vibes. I liked the buzzy synth At first it sounds like it didn't quite fit, but then I think it goes a good way to being representative of the evil magic.  The shakey harmonica is just perfect- someone trying to make themselves feel better but is too scared to play it strongly. Only complaint is that I would have liked it to be able to loop (maybe it would if you chopped off the 45 second intro).  This would be good music for voice acted dialogue to be on top of. 

The music is great! I really liked how the piece evolved, constant motion but changing just enough to keep it from becoming monotonous, which is perfect for a game like necro swarm. For me I want a melody to hum to at some point, I felt like the melody was put into the timpani and for me this is ok, it would have been nice for it to be passed to another instrument at some point. The addition of the theremin-like synth really helped sell the spooky vibes of the game! For the sound effects, the Necromancers den really stood out to me as a great ambience. The wall crumbling was a bit too low-passed for my taste, and maybe lasted a bit long. Overall very nice work!

My thoughts --

• The music is foreboding, varied, and very well orchestrated. It gives me AOE vibes, but darker, especially when other percussion instruments and synths come in. Mixing could do with a touch of polish.
• The necromancer's den sounds eerie. A little more air and it would have made my hair stand on end.
• The spellcasting FX makes me think of some sort of fire or lightning.
• The wall crumbling felt like a much taller, much hollower structure made of metal was falling down, like a ship breaking or some scaffolding or structural work twisting apart before snapping and crumbling down. I don't know if that's what you were going for, but I thought I'd put down what it evoked for me!

I feel that this befits a much darker experience overall. As I said before, this gives AOE, but darker, which is a good thing in my book. Well done, and all the very best!

This is my submission. Three SFX and my vision for the Main Theme. I hope you all enjoy!

EDIT: sorry everyone! I didn't realise you could upload loose files!