You may activate Ninja's augment ability any time you could cast an instant.
Whenever this creature deals combat damage to a player,
Augment {2}{B} ({2}{B}, Reveal this card from your hand: Combine it with target host. Augment only as—oh, nevermind.)
Near Mint - $0.20
Near Mint Non-English - $0.20
Lightly Played - $0.20
Lightly Played Non-English - $0.20
Played - $0.20
Played Non-English - $0.20
Heavily Played - $0.20
Heavily Played Non-English - $0.20
Damaged - $0.10
Damaged Non-English - $0.10
Foil Prices
Near Mint Foil - $1.30
Near Mint Foil Non-English - $1.30
Lightly Played Foil - $1.20
Lightly Played Foil Non-English - $1.20
Played Foil - $0.90
Played Foil Non-English - $0.90
Heavily Played Foil - $0.80
Heavily Played Foil Non-English - $0.80
Damaged Foil - $0.70
Damaged Foil Non-English - $0.70