Barogar, hunting predator

Companion -- Your starting deck must not
contain more than twenty land cards.
Flying, Haste
Whenever you cast Barogar, choose {x}, with
{x} twice the number of times you took
Barogar in your hand from the companion
zone : Barogar enters the battlefield with a
menace, deathtouch, first-strike, trample,
prowess, vigilance or +1/+1 counter.
At the beginning of each player's end step,
you may return Barogar from the battlefield
or your graveyard to the companion zone.