Ethereal Workshop
Welcome to Ethereal Workshop!
Ethereal Workshop is the second half of the Ethereal class, but unlike Ethereal Island where it hosts only singles and doubles, the Workshop hosts the triples and beyond!
Getting started/Basic mechanics 
When you first unlock the island, you will be met with a 
Meebkin egg ready to hatch. Once placed, you may continue farther!
Ethereal Workshop has interesting mechanics, and isnt your standard breeding island. There are two main ones, being the Synthesizer and Attunement Structure. The Attunement Structure is where you will harness Ethereal energy via meebs, and the Synthesizer uses those meebs to create new monsters!
The Attunement Structure has a ring of each mirror natural island. The closest one will cost 
500 shards and take 5h to attune, the two in the middle will take 1,000 shards and take 10 hours to attune, and the two in the back take 5,000 shards and 20 hours to attune. This cycles every day at 11:00am ET. During daylight savings it resets at 12:00am ET. You use the Attunement Structure to turn Neutral Meebs into ethereal meebs! The amount of meebs you have depends on your castle tier. For higher meeb amounts, upgrade the castle!
Expanding the Workshop family 
The Ethereals on the workshop are highly unstable, so be prepared for failure. Once you've gotten enough attuned meebs to synthesize a monster, give it a whirl! The meter will show how high of a chance you have to synthesize the monster.
Due to the unstableness of the workshop, you must upgrade the synthesizer to unlock more unstable ethereal combinations. Below is a list of which monsters you unlock with each synthesizer level:
Base synthesizer
Refined Synthesizer
Hyper-Refined Synthesizer
Super-Hyper-Refined Synthsizer
Mega-Super-Hyper-Refined Synthesizer
Ultra-Mega-Super-Refined Synthesizer
The workshop will cost you early on, so make sure you have good shard production beforehand! Each Synthesizer upgrade will also make it easier to synthesize monsters unlocked at previous tiers.
Rares 
The rare workshoppers are tuned up versions of their common selves! Obtaining them is pretty difficult though. To get rare workshoppers, you must upgrade your attunement structure for 50,000 shards. Select "tune-up" on the structure, and choose a monster you want to evolve!
The two islands in the back will always have rare tune ups available. To tune up a monster, you must attune meebs normally on islands that have the rare sigil () and match the monsters elements. For example, Meebkin has 
Plasma, 
Shadow, and 
Crystal. In the image above the crystal element has the sigil next to it, meaning I need to attune meebs to that while its available. If and when you succeed, your workshop monster will have that one element tuned up. You must repeat this process multiple times, and once every element the monster has is tuned up, it will evolve into its rare form! This is a lengthy and costly process, and it will take lots of patience as the wait times are so long. You arent guaranteed to get what you want, so be prepared to wait.
Farming
Farming time! Ha, barely. Ethereal Workshop is the least farmable of the islands, due to the fact that it has such low castle space. No grid needed for right now. The best way to farm would be to have lvl 20 Teeter-Tauters everywhere! Now, most if not all rares make more than Teeter-Tauter. However, when rare Teeter-Tauter releases this will not be the case!