Just want to verify that paying life (plunge into darkness)is treated differently than damage (intervention pact)

You can’t pay life you don’t have and damage prevention effects don’t stop life loss.

So if you’re at 0 life with a Platinum Angel, City of Brass works but Mana Confluence doesn’t.

If someone vapor snags you’re creature when you’re at 1 with a Worship you loose even if you have another.

Thats what I thought.