Drominos, Corrupt Tempest

As an additional cost to cast Drominos, Corrupt
Tempest, you lose 6 life.
When Drominos enters the battlefield, deal X
damage to up to six target permanents, where X
is the number of shock counters on creatures
you don't control.
{2}{r}, {t}: For each opponent, Drominos deals X
damage to that player, where X is the number of
creatures with shock counters that player
controls.