Rex Roverdover

At the end of each combat phase, gain 1 life for
every nontoken creature that was sent to the
graveyard from the battlefield during combat.
{b}, Pay 1 life: Exile target creature in a graveyard
that was sent there this turn. Create a 2/2 Zombie
token with decayed. Activate only once per turn,
and only if you control no creatures with decayed.
"Friendship lasts forever."