DarkSteel

Indistructible
{2}Sacrafice this artifact, target equipment gets Indistructible for the rest of the game.
{4}Sacrifice this artifact, target artifact gets Indistructible for the rest of the game.
{6}Sacrifice this artifact, target creature gets Indistructible for the rest of the game.
{10}Sacrafice 4 of these artifacts, add darksteel
golem to the battlefield.