Zarkara, Solemn Corrector

Flying, forestwalk
Zarkara, Solemn Corrector attacks, if defending player doesn't control a forest, choose one of their lands. Pick a color at random. That land becomes a Plains in addition to its other types, if the chosen color was white. the same goes for Swamp is black, Island is blue, Mountain is red, forest is green. That land is that type for the rest of the game.
When Zarkara deals combat damage to a player, put a +1/+1 counter on it.