(As a side note, you get as many basic lands as you'd like for your deck, and you don't have to draft them
I expect this to be remembered for a long time as a card that wins a ton of Limited games though, great rate for a flyer to begin with and then excellent card selection on top
Because the Valesk's toughness is only 2, and the Mauler has trample, which means 2 of its 4 damage gets dealt to the Valesk, and 2 gets dealt to the opponent
The tapping requirement to deal damage to a spirit (not the most common creature type) isnt really relevant when you have to tap to attack anyway
The problem is that Set Boosters are not designed for Limited play
Gandalf the White is a five-mana White 4/5 with flash, which means you can cast it at any time you could cast an instant