World of Steel

When World of Steel enters the battlefield from
your hand, put {x} Tithe counters on World of
Steel.
{t}: Add {u} or {b}.
Harvest—{x},{t}: Put a token on the battlefield
that is a copy of target artifact equipment or
vehicle you control with a converted mana cost
equal to or less than {x}. ({x} is the number of
Tithe counters on World of Steel.)