Thunderdrum

Thunderdrums are Scarce Dragons of the Tidal Class.

UNIQUE Thunderdrums encountered in the game include Bam, Bing, Boom and Thornado.

Acquisition
A Thunderdrum egg can be purchased from the shop for 450 Runes.

A Thunderdrum egg can be found when searching the following locations: If a Thunderdrum egg is in an extra bag that the player chose not to purchase when searching with Toothless, the egg can be purchased for 400 Runes at this time only.
 * Black Heart Bay for 4h
 * Dragon Graveyard for 10h
 * Madman's Gully for 8h (Limited Time)
 * Puffin Point (Pain) for 3h (Limited Time)
 * Knucklebone Knoll for 8h (Limited Time)