Reasonable casting cost (or cheap for an Angel), boardwipe protection, combo potential
While I personally wouldnt say this is one of the top five blue cards in Modern, it has been a solid addition to Grixis Shadow as it can combo with Deaths Shadow to create a 13/13 creature for a turn irrespective of your life total, as well as being a solid addition to sideboards of many blue decks in the format
Chaos Orb can destroy any permanent that it touches, along with itself, once the physical card is flipped like a coin over the table
Essence Reliquary Going all in for an attack in Enchantress will feel more comfortable
As long as Maui survives, you can use the Fish Hook to give Simba Evasive for free every turn
To see what exactly that deck was made out of, you can see our Disney Lorcana best decks article