Hey everyone. So i used to play MTG competitively but that was a bit over 5 years ago and fell out of the hobby due to school and starting my career. I just started really having the time to get back into it and my friends have brought me into their group. I mainly played standard but they play commander, I am not super familiar but a good enough player to hold my own. I had a stock Prosh, The Skyraider of Kher deck and got whomped, their decks simply out preformed and were more tailored. I wanna build a deck around this card Nethroi, Apex of Death and would appreciate anyones help and suggestions. I want to stick to this animalistic and evolving type theme. Like lots of beasts, ramp, and deterrence. Thank you for you suggestions
Not trying to be mean, but you might have better luck getting advice for a casual deck in the main forum. cEDH players really aren't going to be able to help you with your Nethroi build, and casual players aren't going to come to this part of the forum to see your post.
The only advice I can give you is that if you specifically want Nethroi to be 'competitive' you're going to have to be as cutthroat as possible and maybe not focus so much on the commander, since the card is extremely far from playable competitively (mutate as a mechanic, really) and not having a good commander is a huge handicap.
Prossh is actually a decent 7-8 on the power level scale if built properly, so if you liked that deck at all I'd consider revisiting it (and get a copy of the card Food Chain).
Other than that, consider going to EDHREC.com and looking up what others are doing for ideas.