Wilder, Machine Herald

Metalcraft — As long as you control three or
more artifacts, Wilder, Machine Herald gains
hexproof.
{1}, {t}, Sacrifice an artifact: Draw a card.
{2}, {t}, Sacrifice two artifacts: Wilder, Machine
Herald deals 3 damage to any target.
{5}, {t}, Sacrifice five artifacts: Search your library
for an artifact and place it onto the battlefield.
Shuffle your library.