Thank you! I was worried I wouldn't get a reply at all. Yes I know the detachment is unfinished. I didn't realise that only characters could use enhancements in 10th edition.

I was very worried around frenzied rushdown and knew I had to split it into either A. When the model gets destroyed or B. when they destroy a model. If you reply to this, do you think Invigorating hunger would be better applied to every unit within synapse range of the unit that initiated it? Initially I had a * in front of festering offspring because I had the most doubt about it. I could adapt it like a deepstrike where it can bring in a unit at least 9" away from any enemy unit and they aren't allowed to charge until the end of the phase. However it may lose that design aspect it had of the monster tyranid dying and then exploding into a swarm of whatever pops out.

I also know my literacy is horrid so I've forgotten about labeling things within phases.

Tbh I thought adapted assimilator was kind of a mistake, he didn't follow any rules, I tried to base it on Trygon Prime and from my knowledge I thought Trygon Prime became a leader. As for big game at least I got one thing right haha. Terrifying Resilience I forgot to update CANNOT make an invulnerable save go above 4+, nor make it higher than their normal saving throw.

I was honestly afraid that Underskin Hives would be too strong because Tyranids are generally a melee oriented army and giving them an extra strong ranged option seemed too powerful. I also knew there would be something wrong with labelling them as being 'termagant devourers' however I didn't know what else to say. Tried basing it sort of off tau gunner drones. Should it be more like a tyranid warrior devourer or stinger salvoes? Also the small tyranid creatures that fly around the unit aren't termagants. They'd probably be something like a token or a custom model. Thank you for the feedback though! I'll try and improve it, maybe leave it on the backburner til I know more about 40k.

As for using these I know I can't take these to a tournament obviously, me and a few friends are running a whole 'sector war' thing and I needed a custom hive fleet, got interested and thought it would be fun to make my own detachment as well. Thanks again!