Loz, Cruel Scientist

{u/b}{t}: Create a 1/1 Golem artifact creature token.
{u/b}{u/b}{t}: Sacrifice 3 artifact creatures. Create a 4/4 Titan artifact
creature token.
{u/b}{u/b}{u/b}{t}: Sacrifice all artifacts. For each artifact sacrificed this way,
your opponent loses 1 life and you gain 1 life.
At the end of that turn, sacrifice Loz, Cruel Scientist.
"None of my creations can replace my fallen friend!
So I will rebuild him! I will stop at nothing!"