Sentient Genesis

As long as Sentient Genesis is in the command
zone or on the battlefield, divide the battlefield
into alpha, beta and gamma sectors. If a creature
isn't assigned to a sector, its controler assigns it
to one. opponents assign first. Creatures in each
sector can be blocked only by creatures in the
same sector.
Indestructible, haste
{t}:Put a +1/+1 counter on each creature in the
sector of your choice.