Balance 0/10. There are two options: The amibigious "Destroy enemy King" square is somewhere, where it can use it on him at t2, or it isn't. Completly broken/ or completly underpowered.
Btw I interpret the ability like Liliths "(Magic) charm enemy minion." ability, since that's how it's worded, it can only destroy King, if the King is on the destroy square.
Could you please link the piecemaker, so we can see if there are any Destroy enemy King squares, which are relevant for t1?