The first talk of an Owl was in the press release for Azurite Sea: Illumineers sail the dangerous Azurite Sea seeking the owner of the hidden inkcaster discovered in Ursulas Return
To help you get there, Fecund Greenshell also has an ability that triggers when it or another creature with toughness greater than its power enters the battlefield under your control
Now, how much of that is due to the cards chosen, and how much is down to Lands being altogether less game-warping than say, Enchantments, is another question entirely
That is not a bad little effect, and every bit of Lore helps
She's better in combat, which is where you'll do most of your work
However, you can still only play a land during your turn and only if you have an available land play remaining