lorcana whispers in the well cards - listen to the whispers The first Legendary card from

Similarly, if a creature with melee enters the battlefield attacking, melee won't trigger

It does only target nonbasic lands, but many decks in Commander play plenty of nonbasics, with some not playing basic lands at all

The Emperor of Palamecia A mana dork for spells, The Emperor of Palamecia combines it with growing when you cast bigger spells, and as The Lord Master of Hell can potentially deal a lot of damage to foes, but really wants some evasion

Keep the serialized cards all good and release a version, maybe where just the Chocobos feathers are gold foil, and have it be unserialized

The Hexproof though is of absolute value, as being able to ignore direct removal on the base creature is worth far more than getting it from some other source