Dread Warrior works as angels are humanoids with outsider subtype. Humanoid refers to mostly two arms, legs and head (assuming spell itself does not have written limit what humanoids it can animate). I assume said spell works on any humanoid based body (than on animal example).<br/><br/>Death Knights are largerly unique and are creation (originally) by Orcus. They are undead empowered by a deific figure (which Orcus was for time). But any evil/undead deity can have death knights. Anansil could create them once she gains something similar deific status (here cults and also gaining sort divine power helps to achieve it). Anansil could of course store/preserve bodies until she can make them death knights. Or she research/studies to creating new kind undead creatures made from celestial body.