When you attack with Zoom in, opt X, where X is the number of times you have boosted this combat chain. (Look at the top X cards of your deck. You may put them on the top and/or bottom in any order.)
Boost (As an additional cost to play Zoom In, you may banish the top card of your deck. If it's a Mechanologist card, Zoom In gains go again.)
Near Mint 1st Edition Normal - $0.50
Lightly Played 1st Edition Normal - $0.21
Moderately Played 1st Edition Normal - $0.17
Heavily Played 1st Edition Normal - $0.15
Damaged 1st Edition Normal - $0.13