Julian the Pauper

Companion - Your starting deck contains no rare
or mythic cards. (If this card is your chosen companion,
you may cast it once from outside the game)
When Julian the Pauper enters the battlefield, you
may choose a rare or mythic permanent you own
from outside the game and place it into the battlefield under your control.
Common and Uncommon creatures you control
gain +1/+1 as long as you control
Julian the Pauper.