Doran, Besieged by Time 334/273 (Lorwyn Eclipsed) - Showcase

Each creature spell you cast with toughness greater than its power costs {1} less to cast. Whenever a creature you control attacks or blocks, it gets +X/+X until end of turn, where X is the difference between its power and toughness.

NM - $3.90
LP - $3.10
MP - $2.30
HP - $1.60
DMG - $1.50