This card even has a deck built around it. It's called Flying Glories. It's based on slowly but certainly making your opponent die. while you MANAGE TO STAY ALIVE. The last part is assured by the AWESOME Miracle / Shard of Divinity combo.
Also, this is great in Rainbow decks, since those don't use too much Light quanta anyways. I like to think at it like at a second life in a video game. It also annoys your opponent badly.
All in all, this is a very good card, thus thought to be the best Light card.