Lightning Wolf

The sorcery-speed clause on that first-strike ability is the whole reason this is a common and not a combat menace. A 4/3 body that can grant itself first strike would tilt most on-board standoffs in the attacker's favor, but by restricting the activation to your own main phase, the design forecloses the reactive trick entirely. You can only pump before you attack, never in response to a block, so a defender declaring blocks always knows whether first strike is coming. The window is the point: the ability still matters during that same turn's combat, but you must commit the mana in advance and show your hand, which turns a would-be blowout into an honest, readable attacker. Hold the mana past your main phase and the ability does nothing that turn. It is a familiar red vanilla-plus template, a body priced a touch below the curve paired with a pump whose ceiling is deliberately clipped, and the sorcery restriction is what keeps a body this size from asking too much of a common slot.