https://civitai.com/models/866015/venom-or-marvel-character-or-illustrious-and-pdxl

Venom

Venom is a character appearing in American comic books published by Marvel Comics. The character is a sentient alien symbiote with an amorphous, liquid-like form, who survives by bonding with a host, usually human.

Illustrious:

Weight: 0.8 - 1

Promt: Venom, black body.

Pony Diffusion:

Weight: 0.8 - 1

Promt: Venom, black body, claws.

Hi-Res fix and Adetailer recommended.