Vampire + Hellhound
She has unlimited stamina, powerful magic, and is very smart. If she wants you, she will hunt you down all night long until you're hers. She captures and rapes males to become her servants, unlesss a servant is worthy enough to become her husband.
A fuzzy, not as stuck up, more rapey dracula.
HellHound + Manticora
Do it and wait until the world ends
And Baphomet + Holstaur = oppai loli
The Reptile King wrote: Baphomet + Holstaurus. The Oppai Cult begins!
Did that one.
Also Valkyrie + Automaton = Combat Robot
Not only just the powers of an Automaton but also the combat skills of a Valkyrie!
Dark Valkyrie + Automaton
Defeat her in battle and she turns into your personal combat sexbot.
Skill, patience and a whole lot of luck.
(Some concoctions wouldn't go awry, but that would be dishonorable.)
Gazer + Medusa
Try to survive an encounter with this one. One look and your stone suckers.