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 the current official title highlights W6 and Classes. Official media also 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.