The Motherlode Maw is a dragonkin visage found in the Edimmu resource dungeon in the inner circle of the Meilyr Clan district of Prifddinas. Access to this dungeon requires 115 Dungeoneering. Players are able to put their arm into the maw and remove treasure once per day, if they meet the requirements of level 115 Dungeoneering plus level 95 in all other non-elite skills. Players without the level requirements will receive a message stating the required levels to access the Maw. Rewards include a range of items, some of which can be useful in helping players complete requirements for the regular and trimmed Completionist cape. Rewards received are weighted towards requirements which have not been completed by the player, but it is still possible to get items towards requirements that players have already met. Once per day, in exchange for 10 motherlode shards, Wythien will give the player rewards similar to those given by the Maw.
Receiving an impling jar from the Motherlode Maw does count as catching that type of impling for Daffyd's impling checklist. The pirate impling can be obtained even without completion of Rocking Out.
^Finds the recipe for the next combination potion recipe that the player had not yet found. If all recipes have been found, receiving this will instead automatically unlock the next recipe that had not yet been purchased.
^Not given if the player already has max aquarium prestige.
^ ab6/20 chance to access a table with 1/85 chance for this item.
References
Trivia
Prior to the 5 June 2017 update, only a total level of 2585 was required to access the Maw. This was changed in a hidden update to require certain levels in individual skills.
Air and fire runes can be used on the Motherlode Maw to get responses from it.
Using an air rune on Maw will give the player an ancient air rune with the text "The maw gives out a gust of wind, whatever was in there is now no longer present."
Using a fire rune on Maw will produce the text "The maw crackles with flame, as the night is dark and full of terrors..."