So gravekeepers? I heard someone call gravekeepers meta, but on DN I've never seen someone run them. At locals, I've seen them once or twice, but still not a prominent deck type. And can Anti-meta cards be meta?

It is not really meta but it counters popular deck types dw, inzektor, chaos dragons etc.

Well necrovalley stops stuff from being removed and makes the grave untouchable not to mention making all the gks instant beaters. It's anti-meta but by being so good at it it often becomes meta in the slower formats. So that's where the confusion can come in.