Zombie Token (Casual)

I have no clue how modern/ standard/ ect work so I just put it as casual.

Discard with:
Cryptbreaker - Create a 2/2 Z-token
Skirk Ridge Exhumer - Create a 1/1 Z-token that hands out -1/-1 counters

Discard:
Gravecrawler - Bring him back same turn for cmc 1
Slitherhead - use as a emergency +1/+1 or keep in grave to buff Diregraf Colossus twice. for cmc 0
Call to the netherworld - bringback gempalm or Diregraf for cmc 0
Never // Return - can discard or play for mid/late game zombie tokens.

Cycle for mass damage:
Gempalm Polluter - Cycle for cmc 2 and 1 damage for each zombie

Draw:
Gempalm Polluter - Cycle to Draw a card and do damage.
Cryptbreaker - tap 3 zombies lose 1 life and draw a card

Create tokens with:
Diregraf Colossus - Bring back Gravecrawler and create a 2/2 token each time.
Cryptbreaker - Discard for 2/2 tokens
Skirk Ridge Exhumer - Create 1/1 tokens that give -1/-1 counters
Army of the Damned - Create 13 2/2 tokens
Endless Ranks of the Dead - get 49% of your current creatures / tokens as additional tokens each upkeep.

MISC:
Lilliana of the Dark Realms - use to get lands every turn for play or discard
Endless Ranks of the Dead - Black version of anointed procession
Army of the Damned - play 13 zombie tokens and play 13 again from graveyard
Dark Ritual - use this to have a massive starting phase or play Liliana of the Dark Realms / Army of the Damned / Bring out a bunch of creatures
Never // Return - Use Never to keep their plainswalkers off the field or kill annoying creatures.