Start with what the game actually confirms
The official description establishes the core Gates → enemies → Souls → undead army → upgrades loop. This wiki keeps missing stats and rules visibly separate.
Raise Your Shadow Army names Skeletons, Zombies, Guards and rare boss units, while official media shows mixed armies, Wave 1 to Wave 99 framing and Common-to-Mythic progression.
Public sources do not yet provide a complete named roster, combat stats, summon odds, world unlock tables or Rebirth requirements. The linked pages show safe player steps instead of filling those gaps with guesses.