As Energy Vortex enters, choose an opponent.
At the beginning of your upkeep, remove all vortex counters from Energy Vortex.
At the beginning of the chosen player's upkeep, Energy Vortex deals 3 damage to that player unless they pay
for each vortex counter on Energy Vortex.
: Put X vortex counters on Energy Vortex. Activate only during your upkeep.