Whenever a Knight you control deals combat damage to a player, put a +1/+1 counter on a creature and create a Blood token. (It's an artifact with “{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.”)
Near Mint - $3.80
Lightly Played - $3.40
Played - $2.70
Heavily Played - $2.30
Damaged - $1.90
Near Mint Non-English - $3.80
Lightly Played Non-English - $3.40
Played Non-English - $2.70
Heavily Played Non-English - $2.30
Damaged Non-English - $1.90