Ancient Cellarspawn's last ability resolves before the spell that caused it to trigger
The Approximate Value: $23,000 based on SCG SP value across the board
It slides into almost any deck, turns slow openings into explosive starts, and is so strong that outside of EDH its often restricted or straight-up banned
FromTheShire: This is actually quite powerful, it's flying so you can repeatedly get through, it can be tutored for and recurred by The First Doctor, cascade lets you cheat mana costs which is excellent, AND you can choose to planeswalk if you're on a plane that is bad for your game plan
In my opinion, the most important element to understand about Tarkir Limited is that the cards are created unequal
Its design is an amalgamation of a shark and a torpedo, capturing both the speed and lethality associated with these two elements