Jeskai Infiltrator can't be blocked as long as you control no other creatures.
When Jeskai Infiltrator deals combat damage to a player, exile it and the top card of your library in a face-down pile, shuffle that pile, then manifest those cards. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
Near Mint - $0.90
Near Mint Non-English - $0.90
Lightly Played - $0.80
Lightly Played Non-English - $0.80
Played - $0.70
Played Non-English - $0.70
Heavily Played - $0.60
Heavily Played Non-English - $0.60
Damaged - $0.50
Damaged Non-English - $0.50