Berserker Dragon

As an additional cost to Berserker Dragon, sacrifice a creature.
When Berserker Dragon enters the battlefield, it deals damage to each player equal to sacrificed creatures power.
{p/b}{p/r}{p/g}: Put a +1/+1 counter on target creature. If you paid this ability with life, put three +1/+1 counters on that creature instead.
Death from above... literally.