I am just saying it is already easy to skillchain light and darkness without the use of relic or emp WSs.

To limit Void to only relic or emp WSs is just saying that only certain people in the game can create that.

I mean, whats stopping the fact that you can create Light WS, then use a Darkness WS like Steel Cyclone to create Void also? Savage Blade > Chain Affinity > Goblin Rush > Light > Steel Cyclone > Void.

Same concept as you mentioned, but you seem to want to limit it to relic/emp WSs only.