You just have to attack with a creature and, regardless of whether it hits a player or dies, you get the card either way
That means you shouldnt have any fear for attacking, even if some of them would have died in combat
The Grand Strategist ability will buff one of your artifact creatures and provide them with evasion in the form of menace
You may cast that card until the end of your next turn
The card isn't unplayable -- it's okay (but not great) in Mono White Lifegain decks because the options are so bad -- but holy crap the amount of hoops WOTC wants you to jump through for White to have marginal card draw would be hilarious if it wasn't so sad
Most of my dorks that block flying have reach, not flying, and some, like Zetalpa, will survive with indestructible and a huge butt too