CLTR OS007 Soul Syphon

OS007 Soul Syphon
Is the dealing of the unavoidable damage all at once, or is it multiple instances of 1 unavoidable damage (per click healed)?
Friendly characters can use Regeneration as FREE. When they do, for each click healed deal another friendly character 1 unavoidable damage.
Is the dealing of the unavoidable damage all at once, or is it multiple instances of 1 unavoidable damage (per click healed)?