Darksteel Leak

Companion - all cards in deck share a cardtype
If Darksteel Leak is your companion start the
game with it in play
Upkeep get an experience-counter if you have 4
ot less, then get an darksteel trash artifacttoken
with indestructible an shroud if you have less
darksteel trash tokens than experience counter.
sacrifice 20 darksteel strash tokens: win the game