On tap micro Lucky!. Once per turn. Helps your friends too. Holy moly this chick is up there with the very best allies in the game and by far the hottest girl on campus!
Lucky! is historically among the most useful "deck grease" cards in the game, it makes you better at everything and anything and since playing it is an afterthough it gives you a LOT of leeway to either depend on it to cover the really harsh tokens or to try and beat a test you have no business beating in the first place.
Granny Orne is expensive for a card, the faction doesnt typically require you to gather resources and many characters can coast by by the merit of their natural gains, playing Orne means you need to hold off on playing too many 2-3 cost events like "Look what I found!", Trial by Fire and weapon assets like Meat Cleaver, Ornate Bow and Timeworn Brand become the sort of financial pain that characters typically deal with.
Thankfully,Granny Orne is worth the cost. An on-tap mini-lucky to effectively raise any skill retroactively by 1 is a brilliant ability, and she also sports a defensive boost to and greatly buffs clue-power (effectively by +2 while her ability is unused). All of a suddent a Yorick is clue-ing low shroud spots as though his were 4 and Wendy is clueing like a 5 seeker before accounting for any items she might be using.
I think its fair to say that Orne will be replacing Peter Sylvestre in decks that dont actively depend on Pete's horror regeneration, since the + is objectively better than a + for most characters, the micro-Luckies will easily make up for the added cost and lack of +.
P.S. To whom it hasnt occurred yet, the ability to get a -1 may open the window to play stuff like Eucatastrophe.