Here's an ongoing series on undefined length highlighting little cameos, nerdy references, etc. that litter GREEN LAMA: UNBOUND.
We'll start off with a quickie:
The "Third Jade Tablet" makes its appearance in the novel. The "Tablet" -- really an egg -- and the Shard blade that broke off from it are both described as "crystalline," and while it is connected to the same power source of the other Two Tablets it is implied that the Third Tablet is extraterrestrial.
And while I never say it in the book, for all intents and purposes, you can consider the Third Jade Tablet to be made of kryptonite.
So, yeah, The Green Lama? Could totally kick Superman's ass.