Legitimate Science Teacher

When Walter white enters the battlefield or
attacks create a colorless artifact meth token with “{3} sacrifice this artifact: tap target creature you
don’t control, it doesn’t untap next upkeep, at
the beginning of it’s owner’s next upkeep they
may sacrifice it, if they don’t they lose 1 life
for each creature they control”
At the beginning of your upkeep put a -1/-1
counter on Legitimate Science Teacher, then
lose 1 life for each -1/-1 counter on him.