To those who never seen one and never seen one die.
Soul jelly
I found one a month or so back in D25 of Firestorm, the oiler and red rover room. They're cool! But very rare it seems. Seen many more impostocubes and rock jelly's than those.
I have found soul jelly, impostocube, love puppy and mewkat, but I never found oiler baron :(
I've seen several dozen love puppies, mewcats, impostocubes and other phenomena, but I've never seen a soul jelly. Either its far more rare than all of the other rare monsters, or its just my awful luck. Never gotten a heart pennant to drop from a love puppy either.
I believe it (the Oiler Baron) was a Beta-build monster, like the Black Kat, Tortodroone, and Giant Green Jelly. You probably won't see them. Ever.
If you really want to see one, get SpiralSpy, because OOO don't remove now-useless files, in case they become useful sometime in the future.
So I was sitting in haven, eating my din-dins, and OMFG WILD PARTY SEERUS JUST GOT UP AND PARTIED OMIGAWD.
Very nice find. I have yet to encounter one!