I must have missed something somewhere, because there's one thing that's still not clear to me and I'm hoping someone can answer this question:

How do I determine the Sorcery Points used for a Twinned Spell? The PHB says it's equal to the "Spell Level" but I'm not sure if that means the original spell level, or the level of the slot used when casting it. For example, if I Twin a Ray of Sickness spell (which is 1st level) and cast it using a 3rd level slot, does that require 1 Sorcery Point or 3 Sorcery Points?

This is really bugging me cuz it's got me wondering whether to take the Twin Spell option or not.

Many thanks.