Like most Pokmon cards, the value of Latios depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (XY Black Star Promos)
Eustass Kid
Accessibility: So-so Dragonstar is really easy to miss if you don't already know where it is, it took me a little while to find the entrance when I first went, so I think others might have trouble too, especially since there's no sign
Yep, a counterspell stops the parent spell in its tracks (or on the stack)
Voldaren Thrillseeker One of the more recent entries on the list, Voldaren Thrillseeker is a Fling that can also add a couple of other points of damage on
most green decks, in other words