Sweet Death

The Sweet Death is a Mystery Class dragon introduced in Rise of Berk and later became available in School of Dragons.

Description
This deceptive Mystery Class ambusher buries itself and uses its super sweet-scented tongue to lure its prey. If you have a sweet tooth, BEWARE!

When the Sweet Death picks a sweet spot in a battle, it usually stays put until its acid attacks win the day.

Appearance
The Sweet Death has a rather short and stubby body. It has a broad snout and wings. It has a thick tail too. The Sweet Death has a light sand brown colour.

Tree-like Tongue
Its tree-like tongue may be a camouflage. Unsuspecting victims may go closer to it to its tongue and it gives the Sweet Death an opportunity to strike. It appears has pink saplings, according to Hiccup.

Acid
Similar to the Changewing, the Sweet Death shoots highly corrosive acid at its opponents. It is great for achieving offensive and defensive goals and makes it a dangerous dragon.

Titan Wing
Source: Dragons: Rise of Berk

Titan winged Sweet Deaths are bright red in colour, with a pink belly. They still look rather stubby, with a thick tail. White spikes protrude from their entire body and their eyes are bigger. Also, their wings are light pink in colour. A Sweet Death in titan form has a tail covered with smaller spikes.

Trivia

 * As part of a mission, Hiccup mentions that the Sweet Death's tongue looks like a tree. Toothless seems aware of the danger and does not allow Hiccup to inspect the "tree" further.
 * The Sweet Death is the fourth dragon to have "death" in its name, and the second not to be in the Boulder Class.
 * The Sweet Death resembles an earthworm as it has stripes all over it's body, as well has very small eyes.
 * The Sweet Death has blank white eyes in Rise of Berk and red eyes with pupils in School of Dragons.