I always wanted to build an Evil toolbox deck. the Card reads F Discard 1 momentum: Switch your starting character with a character from your hand. The Switched character now counts as your starting character and your hand size and maximum vitality are adjusted accordingly.

How exactly does this card work? Especially, how is vitality affected? My guess would be that you would keep the amount of damage taken, so if you had taken 7 damage max vitality went from 32 to 27, then your current vitality would go from 25 to 20, is that right?

Legacy is calling me, I want this card to work.

Your current vitality stays the same (unless you are switching to a lower vitality character, and your current is over your new max).