Kentaro, the Smiling Cat 13/165 (Betrayers of Kamigawa)

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.) You may pay {X} rather than pay the mana cost for Samurai spells you cast, where X is that spell's mana value.

NM - $4.00
LP - $3.20
MP - $2.40
HP - $1.60
DMG - $1.50