Another reason the card commands a high price is because of the Commander application
That card has very little text if it's your first play
If you kill an attacker or counter a removal spell with it you probably just won
Moon-Blessed Cleric, Idyllic Tutor, Invasion of Theros, and Enlightened Tutor all find an enchantment and get it to where you want it (either in your hand or on top of your deck to be milled into your graveyard)
Healing Glow, and Heal What Has Been Hurt offer a great number of ways to remove damage, whether that be from your sweepers, or from the Madrigals themselves to keep them in play
I also love it in political decks where you are playing havoc with stuff or in Pollow Fort to encourage your foes to swing at each other behind Ghostly Prison effects, or with goad and other forced combat Commanders like Firkraag