I think they have used congealed blood here as it is not very runny. I also think they have kept layering it on to create this strong effect. The reason I like this image is because of the way it only covers half the face and shows the teeth.
Another picture of my glitter skull Products: •Face: @maccosmetics NC30 •Brushes: Sigmabeauty brushes •Brows gold glitter from art&hobby shop •Eyes: @meltcosmetics dark matter all over + Mac goldmine with glitter on the inner corner •teeth/nose used @inglotireland black gel liner for all black outline + blended with dark matter @meltcosmetics. #amazingmakeupart #meltdarkmatter #meltcosmetics #sigmabeauty