Dorado, The Gold-Scourge

Flying, Trample, Deathtouch
Berserker— When this creature attacks, it fights
each opposing creature. If this creature dies
this turn, shuffle this creature into your library.
{t}, {w}{r}{b}, sacrifice a creature: Target Artifact becomes a 0/0 creature and it gets +X/+Y and Hexproof where X is the sacrificed creatures
power and Y is the sacrificed creatures toughness.