The only way to get the table is to craft it:
It is possible to store up to 5 units of Energy in one table. Stored Energy will quickly leak into the world, this process can be slowed down by placing Instability Orbs into the table - one orb slows down the leaking marginally, 64 orbs almost stops it completely.
Leaking has a chance to produce one of 3 different effects. It can create small amount of Corrupted Energy, which can very quickly damage the player, it can try to fill a nearby Energy Cluster with the leaked Energy, or if there is enough Energy stored, it has a very small chance of spawning a new Energy Cluster.