Murthok, Mitosis Master

Haste
Mitosis — Whenever Murthok attacks, create
a 1/1 failed experiment creature token. If you control
7 or more artifacts, create a token that's a copy of Murthok, except the token isn't legendary.
Mitosis Mastery — Experiments you control get
+2 +0 and first strike. (If you control 6 or more
copies of Murthok you become mastered for the rest
of the game.).