The deck has a bunch of other ways besides your horrors to mill your opponents as well to help get maximum value from your commander
Tomik does a nice job of discouraging attacks and helps the game go at your pace
2 Wall of Earth 2 Craw Wurm 2 Dragon Engine 10 Forest 3 Giant Spider 2 Hurricane 2 Ironroot Treefolk 2 Ley Druid 2 Mana Flare 6 Mountain 2 Scavenger Folk 3 Stream of Life 2 Untamed Wilds Red/Blue Deck: Elementalist Win Con 1: Elementals Removal: Siren's Call, Time Elemental 2 Apprentice Wizard 4 Earth Elemental 2 Fire Elemental 2 Giant Tortoise 7 Island 2 Jump 7 Mountain 2 Sindbad 2 Siren's Call 2 Sisters of the Flame 2 Time Elemental 2 Volcanic Island 2 Wall of Earth 2 Water Elemental Red/Black Deck: Sedge Beast Win Con 1: Sedge Troll Win Con 2: Dingus Egg Win Con 3: Murk Dwellers + Word of Binding Removal: Spirit Shackle + Word of Binding Edit: Replaced 2 Sedge Trolls with Stone Giants
Draft, Sealed Limited formats include deckbuilding as part of the game itself
Atogatog Child of Alara Cosmic Spider-Man Cromat Garth One-Eye Heroes in a Half Shell Horde of Notions Jodah, the Unifier Karona, False God Marina Vendrell Mass of Mysteries Niv-Mizzet Reborn Niv-Mizzet, Guildpact Niv-Mizzet, Supreme O-Kagachi, Vengeful Kami Omnath, Locus of All Progenitus Reaper King Rukarumel, Biologist Scion of the Ur-Dragon Scions of the Ur-Spider Sliver Gravemother Sliver Hivelord Sliver Legion Sliver Overlord Sliver Queen The First Sliver The Ur-Dragon Tiamat Tom Bombadil