Except for the type of cards that power-up monsters or Field Cards, these cards are destroyed after use, and cannot be used again
Spot removal is great
Either way, theres still an entertaining meme of a story with these signatures
So for example, Mikus Spark reprints Chandras Ignition, Miku, Lost but Singing is a reprint of Azusa, Lost but Singing and Miku, the Renowned repurposes Feather, the Redeemed
Having one of these effects in the CZ means youll get extra value out of playing selective wipes and removal, and figuring out the puzzle of what nontoken creatures to play that can benefit from repeated deaths in the turn is a fun deckbuilding challenge
So, for example, this is how I would Sideboard against a control deck with a small amount of creatures