"decay priests"

decay priests come into play as mini hiveminds usually acting in the first and second stages of taking a planet, but these priests need a living sentient organism to control so this ends up in a symbiotic relationship.

these priests speak the main dialect of the one infected. they can manipulate the void to make it so inexperienced void walkers will ether become crippled or it will drive them insane, they can also manipulate the void to reflect void magic.