Skull Serpent Handler

When Skull Serpent Handler is summoned, summon a 3/3 Black Skull Serpent creature token with "At the beginning of your upkeep step, grant this creature and a Skull Serpent Handler+1/+0".
At the beginning of your upkeep step, grant a Skull Serpent creature +0/+1.
The souls of the dead fuel my blade, but it would be more fun to see it empower my serpent. A blade can only cut, the serpent can annihilate...