Energy Pedestal

The Advancement "Pedestalling for Time" is not particularly difficult, but can be frustrating due to confusion about the location of coralium.

In order to craft the Energy Pedestal that allows you to charge your Necronomicon for use in rituals, you will need seven (7) monolith stone, one full shadow gem, and one coralium pearl. The monolith stone can be acquired from a shoggoth lair (just go back to the one you already visited), and the shadow gem can be acquired from the shadow mobs in the Darklands biomes in the same way that you did for the flame grilled wopper. The coralium pearl, on the other hand, is a little tricky.

In order to get a coralium pearl, you need Coralium Infused Stone. This is crafted from six (6) stone or stone-like blocks and any combination of coralium gems (as in JEI). In order to get coralium gems, you need to find and mine Coralium Ore. Coralium ore is located in the ground, in vanilla-like distribution, in ocean and swamp biomes. E.G., go to an ocean or swamp biome and mine, just like you would in vanilla for ore. Eventually, you will find coralium ore. Make sure to get at least 24 gems, since you'll need at least 2 coralium gems (one now, one later).

Once you have all the ingredients, simply craft the pedestal, then place it on the ground and put your Necronomicon on it. After this, place the statue you already crafted three blocks away from the pedestal (that's two open spaces, then the statue on the third space). Your Necronomicon is now filling up with PE, which will allow you to perform arcane rituals!