1. Good luck summoning Electrum consistently with just 1 copy of Clayman in your deck
2. There's no reason to limit it anymore at this point, when low level monsters with better Defense AND has an effect, can be obtained in multiple copies already.
Agree with Jaden... It's really not a card worth worrying about. Don't understand the fuss, it's never been relevant in the TGC meta and I cant imagine it making any difference to Duel Links.
If we're on about HERO cards that are worth wanting we need Dark Law in the game. But Clayman? Really!?
Because, as irrelevant as they are, it's still stupid that we have multiple Fusions available that requires Clayman as material, yet we still only have 1 copy of Clayman.