Balancing Drain has been by far the hardest part of designing Captain’s Gambit. Since the very beginning, Drain was meant to serve three main functions:
Allow passive captains (i.e. Puck, Rosalind, etc.) to “attack” other players without actually attacking them;
Prevent players from stockpiling too much energy (this really matters for keeping Prospero in check); and
Disrupt other players from executing their plans