­Silent Attendant + Clouded Landscape

A kinda poor Samite Cleric alike, and.. a really nice land. That's any colour, but not dual; if that makes sense. Nicely done.

So the obvious thing here is a creature that taps for mana. And Theros makes it clear that wizards don't think adding a muck-tonne of mana is a problem, as long as it's done late enough in the game. So.

And green always makes loads of mana, so.. I've almost certainly made a weaker version of something that already exists. So we'll give it a slightly bigger body than your average cleric, and make it a bear for the joke.

"Shrine Philosopher" being a joke on Traveling Philosopher being a grizzly bear?

This is pretty interesting. Reminiscent of Nykthos, Shrine to Nyx (presumably what your Theros reference was alluding to?); also reminiscent of Cabal Coffers and Crypt of Agadeem for that matter. For actually counting creatures, this isn't as good as Gaea's Cradle, which is good because that card is broken in half. It's more flexible than Priest of Titania / Elvish Archdruid though, which is a pretty good spot to be in. This would be fairly popular if printed.

Yes to both the joke and the reference. Didn't realise all the existing ones only counted elves. Maybe this is slightly overcosted, I guess?