
One key difference between this card and the base card that hasn't been touched on...
When the level 0 version leaves play, it takes soothing melodies with it and you can't get them back for the rest of the scenario (removed from game). As such the level 0 version has slot pressure on it for other good Guardian cards.
This text however is absent on this card, meaning once it leaves play your melodies stay, albeit they're the downgraded version of the spell. This removes slot pressure without having to take relic hunter, which further increases the versatility of this card.