Blue/Black Zombie Tribal EDH Creature (30) 1x Black Cat 1x Cemetery Reaper 1x Corpse Harvester 1x Death Baron HP 1x Diregraf Captain 1x Fleshbag Marauder 1x Geralf's Messenger 1x Ghoulcaller Gisa 1x Graveborn Muse 1x Gravecrawler 1x Gravedigger 1x Gray Merchant of Asphodel 1x Havengul Lich 1x Lich Lord of Unx 1x Lord of the Undead 1x Mikaeus, the Unhallowed 1x Nightscape Familiar 1x Noxious Ghoul 1x Phenax, God of Deception 1x Possessed Skaab 1x Prized Amalgam 1x Returned Phalanx 1x Soulless One 1x Stitcher Geralf 1x Unbreathing Horde 1x Undead Alchemist 1x Undead Warchief 1x Vengeful Pharaoh 1x Wight of Precinct Six 1x Zombie Master Land (36) Enchantment (7) 1x Call to the Grave 1x Death's Approach 1x Endless Ranks of the Dead 1x Quag Sickness 1x Rooftop Storm 1x Tainted Remedy 1x Waste Not Artifact (1) Instant (9) 1x Cancel 1x Cruel Revival 1x Devour Flesh 1x Dimir Charm 1x Grisly Spectacle 1x Psychic Rebuttal 1x Psychic Strike 1x Snuff Out 1x Tragic Slip Sorcery (16) 1x Army of the Damned 1x Asphyxiate 1x Dark Petition 1x Diabolic Tutor 1x Duress 1x Hymn to Tourach 1x In Garruk's Wake 1x Macabre Waltz 1x Mind Sludge 1x Necromantic Summons 1x Read the Bones 1x Rise from the Tides 1x Sign in Blood 1x Unearth 1x Zombie Apocalypse 1x Zombify

Its just adorable in my opinion
Harvest Season The ability to generate multiple Rampant Growth effects with one card is nothing to overlook
There are basic Energy cards (like Fire, Water, Grass, Lightning, Psychic, Fighting, Darkness, Metal, Colorless, Dragon, and Fairy, although Dragon and Fairy are now typically represented by other types or Colorless in modern sets) and special Energy cards, which often provide additional effects alongside energy
Null Brooch Null Brooch offers you a free counterspell every turn by discarding all your cards, which is a really steep price to pay
This created a strategy so oppressive that players used it to dominate the competitive landscape for years