Nex, Dragonborne Spellshaper

{2}{b}, {t}, Discard a card: Target player draws
two cards and loses 2 life.
Persist (When this creature is put into a graveyard
from the battlefield, if it had no -1/-1 counters on it,
return it to the battlefield under its owner’s control
with a -1/-1 counter on it.)
Partner (You can have two commanders if both have partner.)
"There is no knowledge that is not power."