You can pay 4 mana to cast it, or you can pay 4 life if you control a swamp
In 2016, a Pikachu Illustrator sold for over $50,000 from Heritage Auctions, but then in 2019 another one of the cards sold for $195,000
Step by step: Insert the GameShark or Action Replay into your Game Boy
Whether you think these cards should be banned or not, the point is that they are expensive, and for many decks, looking backwards provides as many (if not more ) solutions than looking forward would
With wheel effects, like Wheel of Fortune, and ways to earn back the life youre spending, like Aetherflux Reservoir, I have no doubt that it would be an overtly broken card
You can use as many characters as you like for Sing Together , even if their cost for Singer is over the number required