More colored artifacts! Not particularly powerful or exciting ones (as commons often are), but interesting to see.
Witching Well is slightly interesting as a
Trinket Mage target that can generate card advantage (even if
3UU is a fairly inefficient rate to draw two cards).
Run Away Together is adorable. Also looks annoying alongside any
Archaeomancer effect.
Witch's Cottage makes me happy. Not particularly powerful, but I always like seeing nonbasics with basic land types. Entering untapped in the lategame may make it better than
Mortuary Mire in decks that want that effect. Also, if you're only on two other lands, you probably don't want to put a creature on top of your library anyway. Does look like it needs to be in a monoblack deck though, or at least a deck with a lot of swamps.