1. not all undying are upgraded with talent
2. same as reborn bc talent
2. laggy upon summoning with that undying particles, remove that particles and its all good all we need is radius script not fancy visual that make crash and lags
3. its better summoning several at once rather than 1 by 1 like NP treant to avoid lags each time necro summoning
4. on late bosses, a bug can reborn bosses after they are dead semi dominated by necro, and make game crash not able to recon as session is BROKEN and give extra gold too, its count as we kill it when timer is off! maybe the trigger are bc reborn talent

like these:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=947166691

http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=947166649

http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=947166610

http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=947166573

5. remove ultimate veno particles,same reason as above
6. lich need to be auto cast on summoning not trigger manually

pros : this hero like a tower that generated workers on the base, yeah he surely does can stay on base and generated soldiers to war, with dagon,heart,ghost,and b.chest its all good and awesome typed GGWP.

cons: need heavy duty macro, lags and lags, crash, bugs, cant yolo.

overall:
this hero is SASORI if you know what i meant, could be build as tower or could be build as chief of army,good concept beside the bug and serious lags. if all point on above are fixed he surely a GOOD hero

Ps: this is out of topic but should be mention as well,
- on blood mother boss round. its super lag or dc upon bm spawn with her minions , can u hold a couple seconds delay for the minion to spawn and respawn the mini's bm for optimize reason.
- the new doto mech is killing channeling heroes,often you cant cancel channeling skills about 99% on the game when too many action send to server eg: lion E, bane ult,etc,and its killing us. and the same as blink animation like pudge after he blinking he cast hook animation(can u remove it and its look bad, so its more responsive and not using unnessesary poses.XD)