Geomancers are very strange and terrifying illagers that only spawn in the deepslate layer of the caves. They summon magical pillars to trap and explode you, which can be quite a dangerous combo.
They drop amethyst shards and amethyst dust.
They also drop the “Crystalline” armor trim 1/8th of the time if the armor trim addon is installed.

Look at those tattered clothes and ratty beard… he’s been down in the caves a while.
History
| 1.5.0 | * |
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|---|---|---|---|
| 1.3.0 | * | Iceologers and geomancers should have a harder time seeing you through walls now | |
| 1.1.1 | * | Updated geomancer pillars to using /damage, causing the following changes:
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| 1.1.0 | Beta 4 | * | Geomancers no longer drop echo shards when killed nearby sculk catalysts
Geomancers no longer drop budding amethyst
Now drop:
Geomancers’ spawning has been optimized The explosive geomancer pillar’s texture has been updated |
| Beta 4 | - | Geomancers no longer drop budding amethyst
Geomancers no longer drop echo shards when killed nearby sculk catalysts
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| Beta 3 | * | The geomancer pillar textures have been updated | |
| Beta 3 | * | Geomancers and iceologers can no longer see through glass, doors, or similar transparent blocks | |
| Beta 1 | + | Echo shards now drop from geomancers killed nearby a sculk catalyst, instead of their usual amethyst shard drop, making echo shards renewable Geomancers drop budding amethyst 2.5% of the time | |
| Beta 1 | - | Geomancers no longer drop deepslate | |
| 1.0.1 | * | Geomancer pillars now flash before exploding Amethyst dust now drops 100% of the time from geomancers in stacks of 1-2, and is affected by looting | |
| 0.5.1 | Beta 1 | * | Can no longer spawn in clusters Killing one clears any mining fatigue you may have Their damage has been increased, but it no longer ignores armor |
| 0.5.0 | Beta 9 | * | Made it so viewing illager entities in spectator mode looks somewhat proper, rather than a broken z-fighting mess Iceologer and geomancer attacks now benefit from the strength effect |
| Beta 8 | * | The geomancer is now a force to be reckoned with. He’s no longer a wimpy old man that cowers in fear and struggles to cast spells. His explosive pillar radius has been buffed to 7 blocks up from 5 He will now ALWAYS summon explosive pillars if you’re too close After casting any pillar spell, he will chase after you The explosive pillar summoning algorithm has been generally improved, so pillars can spawn in the tightest of caves If the both the explosion and trap spells don’t fit the space, he will resort to giving you mining fatigue for two minutes to prevent your escape He can now see through his own trap pillars, meaning that he can summon explosive pillars on you even when he’s surrounded you with normal deepslate pillars | |
| Beta 7 | * | Changed the normal pillars to use proper deepslate textures Tweaked the timer on explosive pillars Generally improved the geomancer’s model and texture Now has a spawn cap of 10 per world Will now only spawn at the proper height if the world is using an extended height datapack | |
| Beta 5 | + | Replace all witches below y=40 Attack using different kinds of pillars, which can either entrap you in deepslate or explode you Drops amethyst dust, deepslate, amethyst shards, and rarely a pristine amethyst gemstone Comes with a spawn egg that is obtainable via peculiar berries | |