Yes, those cards are always basic lands, and not gas but thats fine
The creature type is so powerful and popular that a lot of good cards are more highly valued than they would be if they were salamanders or sharks, but I cant argue with a mana dork that gives your angels +1/+1 counters as they enter
Its present on a mythic rare cycle of lands, one for each of Magics colors
This debate has been going on since the game was introduced, really, and thats testament to the power of good ol Oak
I can cast it whenever I want, such as during my upkeep or during my opponents combat
(You choose any number of permanents and/or players with counters on them, then give each another counter of a kind already there.) I will not be surprised if this is one of the chase rares of the set