A Promethium maul is a weapon used in the Dungeoneering skill. It is made from Promethium ore, requiring 4 bars and a Smithing level of 98 to smith, and a Strength level of 90 to wield. Promethium maul can also be obtained as a drop. It is most commonly dropped by Rammernaut but may also be obtained by high tier Forgotten warriors and Brutes. They will be seen wielding the maul before they are killed.
| Smithing level||98|
| Members only||Yes|
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|Rammernaut||7; 16; 26; 37; 47; 57; 67; 78; 88; 98; 107; 119; 128; 138||1||Random|