Card Rulings talk:Tempest Magician

I understand that the efect of tempest of discarding cards to add spell counters on a monster on the field can only be activated onece.... my cuestion is the following can I activate the efect " you can remove all spell counters on the field to inflict 500 damage to your opponent for each removed spell counter" in multiple occasions, if I where to add more spell counters after the activation????

Example:

I have Magical Citadel of Endymion on the field with 5 spell counters and Tempest magician with 1, then I discard 4 cards out of 5 cards on my hand, living me with one.That gives Tempest a total of 5 counters, I then activate the damage efect causing  5000. I sill have a card in my hand that is Darworld dealings I activated causing to draw and discard a card but also adding a spell counter to Magical Citadel of Endymion on the field....Can I activate the "damage efect" again so I can inflict those 500 life points????