Where to get it

Creatures		Quantity	Chance
magus ceresMolten CryptThe Ardent ChamberFlamines Volcanalis Foundry	Independent roll	× 1	5%
magus mercuryDance of the MaenadsForgotten HallsThe Final PeaceHidden LagoonDesert temple poolFallen BarracksThe Hidden Vault	Independent roll	× 1	4%
magus marsThe Desolate TombThe MawDesert CryptFortified CryptDesert skeleton dungeon2Hidden LagoonDesert temple poolFallen BarracksFallen CryptHidden AltarPre cyclop dungeonPre cyclop dungeon 2Molten CryptThe Hidden Vault	Independent roll	× 1	4%
magus vulcanHall of ArtificeTemple of VulcanChambers of HeatVolcanic cave tectonic2The Thunderous DeepMolten CryptThe Ardent ChamberAshen CryptFlamines Volcanalis Foundry	Independent roll	× 1	5%
magus dianaMakeshift CampCultist's CeremonyThe Hidden ChambersFortified MazeTiny forest cave cryptProtected CryptSect of Libitina	Independent roll	× 1	1%
magus venus	Independent roll	× 1	6%
minerva projectionSpawn poi	Independent roll	× 1	20%
magus orcusDesert skeleton dungeonAshen CryptForgotten Machinery	Independent roll	× 1	5%
magus minervaHidden StashCultist's CeremonyPath of StrifeHalls of MetamorphosisRhythm of WarFortified MazeTiny forest broken room stashQuaestor's TombCure of RobigusCavern of Broken BonesHidden BastionPlains cave puzzleSubterranean LakeFallen VaultAncient PrisonHero's SlumberTemple pillars	Independent roll	× 1	1%