Rumblehorn

Rumblehorns are RARE Dragons of the Tracker Class.

A UNIQUE Rumblehorn encountered in the game include Skullcrusher.

Acquisition
A Rumblehorn egg can be purchased from the shop for 950 Runes.

A Rumblehorn egg can be found when searching the following locations: If a Rumblehorn egg is in an extra bag that the player chose not to purchase when searching with Toothless, the egg can be purchased for 850 Runes at this time only.
 * The Woods That Howled for 20h
 * Eternitree for 1d12h
 * Wildwood Shores for 4h (Limited Time)

Special Event
The Rumblehorn was available to all players for a limited time from June 13, 2014 until June 16, 2014. The dragon could be obtained via a 4h search at Wildwood Shores or for the special price of 710 runes. If he turned up in one of Hiccup's bag and the player had not opted to use extra bags in their search, they could purchase the egg for 580 runes at that time only.

Dragon Progression
* These values were correct for version 1.2 of the game, they have not yet been confirmed as at version 1.3 where changes are known to be in place.