This type of lock all but secures you a victory since, for as long as the Angel is out on the battlefield, nothing your opponents can do can stop you
With decks becoming more and more reliant on their commanders, interaction like this helps you slow players down and force them to deal with the enchantment before anything else
You'd think so, at least, but when I looked it up on EDHREC it only shows up in 5306 decks - a mere fraction of the potential lists that could be running it
As an alternative for that, use Marie Favored Kitten or other strength buffing cards, then play Stabbington Brother Without a Patch to Rush in and take out must-remove characters
For just three mana, she can bring small creatures back from your graveyard over and over, letting you reuse their powerful abilities