Some things that may draw you into specific colors are: A really strong rare you're excited about Plenty of "removal" cards that can deal with your opponent's creatures A lot of playable cards in that color A good "mana curve" in that colormeaning lots of creatures of different costs Ideally, the colors you pick will have all four of these criteria, but if two or three of those are true, that's plenty good
even cost-10 Characters, but sacrifices one of your own to do so
Each land here represents a different location in the Forgotten Realms, namely Waterdeep on plains, the Moonshae Isles on islands, the Underdark on swamps, Neverwinter on mountains, and the jungles of Chult on forests
If an Adventure spell leaves the stack in any way other than resolving (most likely by being countered or by failing to resolve because its targets have all become illegal), that card wont be exiled and the spells controller wont be able to cast it as a permanent later
22 and can be purchased directly from Wizards of the Coast at MagicSecretLair.com
Pic credit goes to Granblue Fantasy and Konami