I wouldn't be surprised if Kefka returns in another card, with this one being used to represent a way of dropping poison tokens on your opponent and the other presenting him as a summonable legendary
Darksteel Mutation Exxaxl: This might seem like a weird pick to some, but completely strip your best creature of anything it can do can be an incredibly impactful play on an opponent's board state
Indeed, the outlines of the two pieces look like a near-exact match, overlapping pretty precisely
During your opponents next turn, this Pokemon takes 30 less damage from attacks (after applying Weakness and Resistance)
One of the biggest shocks in this set is Leyline Immersion, a green enchantment that lets a legendary creature tap to make five mana of any combination of colours
Since Nathan has first strike you can also include ways to give him deathtouch, which will kill most blockers before they can deal damage