This is great timing, as I've been trying out this kind of magic deck for the whole week (I don't have Pyramid Warden but basically the same as yours, I have tracking bolts for some AOE) and while I'm doing ok, I run into a lot of trouble against zoo/wide boards. Like when Nature plays Bladeflies or Falling Star, or Death/Light zoo with lots of 1/1 and 2/2 sticky creatures, or even against a low deck that just had some axewomen and boars on board, I couldn't get control back. Do you have any advice?
This last weekend I played with my Beast Nature deck (since I'm not confident enough with the Magic deck) and I've crushed similar Magic decks, maybe it was luck but they usually run out of steam even with all that card draw.
Nature is an interesting matchup. If you go first it's fairly easy, you can stay ahead and draw a bunch of cards and clear board. Definitely Ward from Oni getting all over the place is a great counter to nature's Hunt and other random spells.
Going Second is tougher as it always is. Gotta get some good card draw and then get a lot of value from your deck wherever you can.