You  need  a  Revive  Hero.

Siphi,  Gorgorab,  or  Grinner  -  Can  be  anyone  of  them.

The  Boss  hits  to  hard.

He  will  1  or  2  shot  heroes.

If  you  have  no  Revive  Hero,  you  need  tons  of  Heals,  Shields,  and  Ally  Protect.

-  Nekret  the  Great

-  Zelotah

-  Vogoth

-  Elegaius 

-  Frozen  Banshee

Maybe,  the  above  team  could  work  with  out  the  Revive.

All  of  them  need  to  be  in  Immortal  gear.

-  Zelotah  in  Shield  set.

Your  looking  at  a  40-50  min  battle  which  will  have  to  be  manually  played  very  well.

I think you can do without revive, but like J said will be a long manual battle.  Definitely use Nek, that ally protect should help (dont think boss ignores that?). If this is last faction, obviously its worth the one hour battle lol.  

I would steal the best gear you have from everyone just to beat it and get Lydia, even if you have to write down what you took from who so u give it back.   Stack HP, I think this boss ignores defense.

Nek

Mage

Zelotah

FB

Vogoth 

Hopefully 2x weekend brings u some luck and a gorgo :)

And epic faction guardians, hopefully you have dupes and didnt use as chickens :(  I see 2, but hopefully vault has more.

The key is going to be regen gear and 220 speed for mage, zelotah, and maybe even vogoth. Nek will help keep your weekest alive.

Anax got me through 20 but didn't quite cut it in 21.  FB might do better?  Or swap zelotah for FB and try two DPS's.

I used skartosis but he was there more just to confuse the waves.

From  a  Factual  Stand  Point,  Undead  Faction  Stage  21  is  the  toughest  in  whole  game.

The  Waves  leading  up  to  Boss  are  the  most  Difficult.

-  Wave  1  is  Double  Martyr 

-  Wave  2  is  Triple  Valkyrie +  Warcaster  +  Errol

The  Boss  is  the  most  Difficult.

-  A1  -  Single  Target  Ignore  Defense

-  A2  -  AOE  Stun  +  Fear  on  3  turn  Cycle

-  Passive  -  Gains  Turn  Meter  when  ever  he  takes  big  hit.

Undead  Faction  face  the  Toughest  Waves  +  Toughest  Boss.

However,  Most  players  don't score  Undead  Faction  as  tough  to  beat overall.

Most  Faction  List  have  Undead  Hordes  near  the  4-6  Ranking  Range.

The  main  reason  why  Undead  Hordes  isn't considered a  Top  3  Faction  Nightmare  is  because the  Undead  Faction  is  stacked  with  tons  of  heroes.

Undead  Faction  face  the  Toughest  Waves  &  Toughest  Boss,  but  they  also  own  the  Best  Set  of  Heroes.

-  Elegaius is  needed  to  put  the  Valkyrie skills  on  Cool  Down  +  Strip  any  other  Buffs

-  Frozen  Banshee,  Bad  El,  or  Nethril  is  needed  because  Poison  doesn't  trigger  the  Boss.

(The  Boss  gains  meter  from  his  passive  when  you  do  big  hits  on  him.)

-  Gorgorab,  Siphi,  or  Grinner  is  needed  to  help  revive  any  fallen  for  3  star.

-  M.Mage  or  Skartosis is  needed  to  cleanse  your  team  from  Boss  Stun/Fear

-  Vogoth  or  Zelotah  can  be  used  for  extra  Sustain.

I JUST finished this one myself yesterday. And Player J and everyone else is right, this faction is INSANELY difficult.

Tons of Regen gear is about the only way I could see you doing it with your roster. Regen + Immortal even, and as fast as you can get your healers.

Gonna be really tough looks like. :(

cheers guys appreciate your feedback im sort of settled on shard hoarding til xmas then will drop all in hope of that one champ who will help ill keep hammering dungeons chasing gear etc in the mean time 

i had grinner once and thought nah wont need him see ya lol the champs you feed only to see the potential they add later is constantly falling on me hahahahaha 

i seem to beat wave 1 & 2 easily with no champs even close to dropping - elegaius skill cooldwon on valks handy wave 2 and zelotah sleep 

agree about anax solid champ on 20 and both waves but when the boss comes anax shakes and cant get out of there fast enough lol 

gorgo would be friggin handy indeed thanks lol 

I  have  actually  seen  Stitched  Beast  or  Lich  used  in  Undead  Hordes  21  before,  because  the  100%  Turn  Meter  reduction  (and  30%  Decrease  Speed  for  Lich)  can  be  crucial  to  allow  your  champions  to  have  time  to  heal  and  shield.  That's  always  an  option  if  all  else  fails.  You'll  need  to  make  sure  they  can  survive  the  waves,  though.

Im getting near 20 and 21 for this faction and i can tell its gonna be challenging to put it mildly.

How do i take a screen shot with my phone?   I have a galaxy a12.

thanks might just have to try that pulled stitched beast last week - worth a crack 

dropped 25 ancients on hope of gorgorab pulled dupe lugan 

ok so dropped 1 sacred yesterday and pulled saito is he viable over anax? lol yep looking at all options to get the wipe at the moment :)

Honestly, I would just wait until you eventually pull a reviver. Don't force this, because with a reviver it becomes super simple. UH21 was one of the easiest to complete.

lol cheers yeah itching to get it done as you can tell :) 

If you truly want to force it right now - I would go with:

Nehkret

Vogoth

Skartosis

Maus Mage

Elegaius

Basically just - keep yourself alive, keep healing, and slowly wear the boss down.

thanks guys - guess what 

faction wars finally done - spent 40 mil over the coourse of the last month trying to get this team built to wipe it and this morning 1st crack got it done yewwww 

i

lydia is mine finally what a grind but well worth it and now a weight off the shoulders - time to get my arbiter over 350 speed 

i

thanks for the replies and tips guys appreciated big time 

Congrats Ben! Happy for you! Great job getting it done before Shadowkin. :D

cheers, that was the main aim as frustrating as it was lol - glad its done now to switch my area of focus