Sarixan, Chromium Serpent

Sarixan, Chromium Serpent is Indestructible
Every time you play a nonartifact spell, put a
+1/+1 counter on this creature.
Whenever Sarixan, Chromium Serpent leaves
the battlefield, search your library and/or
graveyard for another artifact card and put it
onto the battlefield under your controll.
Then shuffle.