Blue mages are toxic. Choco Tart Factory is mildly toxic on account of it being entirely devoid of humanity until Overwatch picked it as a meeting space.
Ergo, toxic (natch) spirit summoned with water and earth characteristics (I can't recall exactly which it was/ The mages were Sterility Shamans, too, IIRC). So imagine a giant, powerful (It was at least a Force 6) manifestation of evil incarnate composed out of boiling chocolate that is trying to force itself down your and your friends' throats who came to a so-called safehouse with, to paraphrase Sonny Corleone, little more than your dicks in your hands.
There were Sterility Shamans in the SCIRE who I decided would still be around when Critias' PC went back in '64 [Insert a plug for There's Nothing Free, available in the bottom sig link], one for each of the top Banded; Marushige (Blue), Pax (White), and the Green whose name I forget. Funny thing is that when the PCs' mage got his shot at one of their Force 8 spirits he one-shotted that bitch to Hell with a Powerblast.