Infurnal Ill-Bringer

Through magic and twisted ritual you have taken parts from fiendish creatures and made them your own. 

Airbourne Pathogen: You gain devilish wings with a 60ft flying speed. 

Infectious Stinger: You gain a barbed tail capable of inflicting victims with deadly toxins. Once per turn when you hit a creature with an attack you can strike them again with your tail, you deal 6d6 poison damage and the target must pass a DC 18 Con save or become paralyzed until the end of your next turn. 

Devil's Blood: Your natural weapons are always considered poisoned dealing an extra 4d4 poison damage. 

Infurnal Kin: Fiend familiars you have share all your resistances and bonuses to damage for overcoming resistances. 

Hellish Evasion: Your dexterity score increases by 2 and any time a Dexterity or Constitution saving throw would allow you to take half damage on a success you instead take no damage and half damage on a failure.