Any Magic card listed on TCGPlayer or Card Kingdom can be tracked - Commander staples, Modern playables, Standard cards, Pioneer tech, Legacy reserved list cards, pauper staples, anything
This card is massively powerful against Tera decks that utilize Area Zero Underdepths to make their bench larger
The result of this interaction was previously unintuitive to many players: since that Saga had no chapter abilities, the game defined the "greatest number among its chapter abilities" as zero, and no matter how many lore counters that Saga had on it, it would be sacrificed as a state-based action once it wasn't the source of a chapter ability on the stack (usually right away)
After all, if you're new to the game, what the heck is a Drop event
EDIT: Also willing to trade it for Eevees, although Ill have to check which ones I have
(2016-09-20) If the player has any cards in hand as Ghirapur Orrery's second ability resolves, the ability does nothing