Mindbender, Mad Scientist

Biochemical Experimentation-
{u/r}{u/r}: Create a blue token enchantment aura
named Unstable Mutation with target creature gets
+3/+3 and at the beginning of your upkeep put a
-1/-1 counter on enchanted creature.
Mechanical Necromancy -
{2}{u/b}{u/b}: Remove three artifacts from your
graveyard, return one of them at random
to the battlefield tapped.