Wow! Both of those abilities are incredibly powerful, and probably undercosted.

Yikes! Yes, there's no way a land should be able to return a creature every turn - it's crazy powerful and way too uninteractive. (Erm, I guess there is Emeria, the Sky Ruin. Which was also crazy powerful and way too uninteractive.) Let alone getting back instants or sorceries... this gives every card of yours buyback , which seems crazy. (And also reminiscent of that silly new mythic, Soulfire Grand Master.)

I think what I'm saying is, you could keep either one or the other of those abilities, and make this mythic, and that'd still be a good card.

Ok, how about instead I can mill, and "whoops I didn't want to mill that guy.." - so I can bring him back to my hand?

That looks fine. The top ability is precisely Nephalia Drownyard but restricted to yourself, which makes it no good in offensive mill decks - which probably does mean it's okay to add the second ability on here as well.

The second ability is rather better than Volrath's Stronghold, but fairly expensive and requires two colours that aren't the same as the first one. It might still be a bit annoyingly grindy/repetitive, though. Perhaps it could either put the creature back on top of your library (at a reduced cost), or sacrifice to get back the creature (like Haunted Fengraf).

Shouldn't it be rare? I mean, Nephalia Drownyard and Volrath's Stronghold are both rare, and this is almost both those on the same card...

Yeah, this would almost certainly appear at least at rare in a Wizards set, if that second ability would appear at all.