When each angel knight deals combat damage to a player, you'll get some combination of Treasure, lifegain, and card draw depending on your resources compared to your opponents
Theyre a five-mana 4/5 that gives other artifact creatures you control haste, and also read, Whenever one or more artifact creatures you control attack, Alibou, Ancient Witness deals X damage to any target and you scry X, where X is the number of tapped artifacts you control. This is clearly very good, so get on it
If this isnt convincing enough, Gardevoir ex saw a commanding domination of Japans ADV1 to PCG9 sets, which equated to our ex: Ruby & Sapphire through ex: Power Keepers (RS-PK) format due to similar reasons: being able to use Imprison to lock down your opponents board, creating inescapable board states while slowly grinding out damage and taking prize cards
But theres an argument to be made that the mechanic can help you, too
My guess is Nazgul (335)s are currently overpriced and will drop as Lord of the Rings is opened over the next year, but long term, once the set goes out of print, they will likely be shockingly expensive
These 2 SIDED printed, using UV printing technique and high-quality ink, making it durable and vivid color