Also applies to JEI, there is a couple of blocks and items that pop up in creative mode but shouldn't.

Here's a list of them:
-Ancient Infusion Pillar
-Eldritch Infusion Pillar
-Empty Space
-Enchantment Placeholder
-Dimensional Tear
-Glimmer
-Golem Press (there's at least five blocks called this)
-Infernal Furnace (there's at least three blocks called this)
-Infusion Pillar
-Sapping Field
-Static Field
-Thaumatorium (there's at least two blocks called this)
-Warding Aura (Barrier)

Some of those definitely shouldn't show up (especially the multiblock parts). The pillars I feel like could be used for building though - are those able to be placed on their own and not break from adjacent block updates and such?

Looks like you're able to place pillar normally with no issues, the collision is also alright. Some recipes to make those pillars wouldn't hurt actually!