Rule34.GG

Regular 1:1
ambiguous gender
black goo
black penis
blue goo
dragon
duo
feral
firondraak
genital growth
genitals
glowing
glowing eyes
glowing markings
glowing mouth
goo creature
goo transformation
grey background
growth
hi res
imaginarydragon
male
male/ambiguous
markings
membrane (anatomy)
membranous wings
neltruin
night sky body
penetration
penis
penis growth
purple precum
red eyes
simple background
tail
takeover
transformation
urethral
urethral insertion
urethral penetration
white goo
wings