This legendary God Bard becomes indestructible, but only under certain conditions
Another reduces the attack power of a card by two when it's played, helping you avoid reprisal when challenging other players (every time you attack, you also take damage)
In this case, where the trade-off is just a clunky split card mechanic, the juice doesnt seem worth the squeeze
It's going to be rather weak against Goblin Chainwhirler, but the fact that it's an instant allows you to somehow avoid the bullying effect of the infamous goblin from Dominaria
Where Moonbreon is cool and contemplative, Sunbreon is bright and vibrant, and the juxtaposition between the two cards has become a defining narrative in modern Pokemon collecting
You might even get more than four mana, which is kinda nuts so early in the game