Arcum, Mad Scientist

Whenever you cast your first artifact spell each
turn, choose one at random. Create colorless
artifact creature token with those characteristics.
•1/1 Thopter with flying and haste.
•2/1 Myr with haste and "{t}, Sacrifice this
creature: Add {c}."
•3/1 Construct with trample and haste.
{u}{u}, {t}, Sacrifice three artifacts: search your
library for an artifact card, put it into your hand,
then shuffle your library.