Death Helm

Equipped creature gets +X/+5, where X is the difference between your life total and starting life total.

At the start of your upkeep, you lose X life. If this ability causes you to lose the game, target player gains control of it.

Equip {5}

An ancient barbarian cursed this helm long ago. Over time it has passed through generations of generals and kings. To the wearer it gives them the ultimate power, but at a price.