[@King Tai] Sure, two times seems alright. What would th estimate to that be? If becomes extremely light, he'd have great mobility, but his defenses would be vulnerable. Imagine what would happen to his 1 kilogram skeleton if it gets hit with a tackle. Or him being on top of a mount then suddenly increases his weight. Think of th poor horses. Just remember that only weight changes, nothing else. These repercussions are situational though, but if you phrase it well, you could probably avoid some of them.