Jodah, the Unifier

The character has always been a five-color mana-fixing joke: the wizard who can cast anything from anywhere, printed and reprinted as a permission slip for greedy manabases. This version rewrites the premise into an engine. The +X/+X anthem scales quadratically with the board (each legend you add makes every legend bigger, including itself), so a wide legendary pile is both the fuel and the payoff. The cast trigger is the part that repays study: it fires only on legendary spells cast from your hand, not on enter-the-battlefield triggers and not on the free spell it hands you from exile. That from-hand clause is the balancing discipline. Every legend you hardcast digs down through your library and casts a cheaper legendary nonland for free, but the free cast does not itself trigger the ability, so there is no runaway chain: each hand-cast legend cashes in for at most one bonus spell. And that bonus is not always a body: the trigger hits any legendary nonland with lesser mana value, so it will happily flip a legendary instant or sorcery into a free effect rather than a creature, and the anthem only grows when what it finds is a legendary creature. It wants raw density of legends more than a tidy curve, because the trigger simply needs a cheaper legendary nonland somewhere in the deck to hit. The five-color identity that once cost you consistency is now the whole point.