Grounder

 is a rare level 64 bow, purschable from the Galleon's Graveyard Dungeon Merchant found outside Galleon's Graveyard. The feared graveyard is a dangerous Dungeon in the Ocean, close to Pirate Cove.

Having a major damage bonus to thunder, the bow invites a thunder/earth combo. It would fit well with low-level attack tier items.

Obtaining
Grounder can be bought from the Galleon's Graveyard Dungeon Merchant for 4 Redbeard's Hair.