Ulthane, The Black Hammer

Hexproof, Indestructible, Menace
When Ulthane,The Black Hammer comes into
play create a legendary artifact named Maker
Forge that has "{t} add 3 {b}, {r}, or {g} mana in
any combination.
Ulthane,The Black Hammer can block more than
one creature.
{b}{r}{g}{t}Sacrifice a creature or artifact, search
your library for a creature or artifact and put it
into your hand, then shuffle.