Each Draft Booster Pack contains 15 Magic cards (150 cards total)
They'll likely block with things they may not want to in order to stop that from happening
Bounce does what it says on the tin (bounce in TCG terms literally means return a card to hand) and seems good
Number 65 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (7/1/2012) Battle of Wits has an "intervening 'if' clause." This means that if you don't have 200 or more cards in your library at the beginning of your upkeep, the ability won't trigger
This lot would have saved you nearly $10 before Amazons latest price cut