It's a bit convoluted yet a card that's in decent colors for +1/+1 counter synergy
That means it either sold for that huge sum, or someone decided to keep it for now
Adult collectors also have a role in price rises too
Lets say that each set has 1,5 new game design mechanic in average, adding up to 6 new rules each year
Still, assuming the rest of the Revival Trance includes cards that support this ability, Terra seems like a powerful rehash of Alesha, Who Smiles at Death, only with partial flying instead of first strike and integrated milling
I could imagine this in both a go big Simic list or a go small Dimir list, where you grind your opponent out of resources, while having Riddler sitting in the Warped zone waiting to take over the game