I have to say that I enyoyed this commission, it was totally on my line (Dragons!! ). Anyway, those two dragons are Sheahlun (the silver female dragon) and Marashenah (the red male and big one). They are siblings
The coloring is great. but the plot of your illustration is kind'a awkward. Seeing a dragon casting a spell with its hand, that was completely strange and awkward. It is much acceptable if your dragon is casting a spell using its tentacles or some sort of it rather than its hands. But all in all, you've done a good job. I will give it a 7/10.