Main reward for exploration(Something Metroidvania's are supposed to encourage you to do), are materials that make equips that are nullified once you take a single hit, that isn't a reward, that's a slap in the face for getting involved and putting time into your game. It's not fun and is ultimately rendered pointless when you come across enemies that are pointless to fight unless required, or when you come across a boss that you don't know.

Main reward for exploration(Something Metroidvania's are supposed to encourage you to do), are materials that make equips that are nullified once you take a single hit, that isn't a reward, that's a slap in the face for getting involved and putting time into your game. It's not fun and is ultimately rendered pointless when you come across enemies that are pointless to fight unless required, or when you come across a boss that you don't know.