Starspawn [Lovecraftian, tentacles, weirdness]

You are a starspawn, a bizarre and tentacled monstrosity from a cold and distant star or perhaps another dimension entirely. You came to Earth frozen in the comet Wormwood, which struck the oceans and killed a tenth of all living creatures with its bitterness. When your icy prison melted, mad and deranged mortals supplicated themselves to you. To increase your dominion in the mortal realm, you need only touch mortal minds with your tuneless piping. Your appearance is difficult for mortals to accurately describe or perceive, but you manipulate the mortal realm with pseudopods and tentacles. These also serve as your sexual appendages and they are highly versatile in that role - capable of fucking, restraining, or stinging to inject chemicals that transform mortal bodies. A mortal woman needs intense preparation before she is capable of bearing your brood, but once properly modified she can produce offspring continuously with little to no further input from you as her firstborn spawn continues to mate with her. Your spawn are limited in magical ability, but they are very numerous and under your absolute control. You can imbue loyal cultists with magical power, but this is fairly taxing and a risky investment as even magical mortals are easily killed and there's no way to retrieve power lost to a dying mortal servant. Your mind is utterly alien, and while you can *communicate* very well with mortals you can never truly form relationships with them in the way that others can.