Thunderdrum

Thunderdrum (Korean: 태고의 천둥북, taegoui cheondungbug, "Primordial Thunder Drum") is an Epic Treasure released alongside Roll Cake Cookie as part of the Grand Cookie Party update. It summons lightning strikes after running a certain distance.

Story
''This drum was discovered at the top of a thundercloud-covered mountain. Beat this drum as hard as you can, if you're not afraid of thunderstrikes!''

Trivia

 * Thunderdrum's original effect was more sporadic and random, this however was changed to have the Treasure more aligned with distance instead.