yugioh chaos angel deck BLGG-EN143 - - Starlight Rare you can treat 1 LIGHT or DARK monster you control as a Tuner Chaos Angel | Yu-Gi-Oh! Wiki

Cant lose is like having a Platinum Angel on your team, or having cast an Angels Grace at all moments

This is known as the green dot test, and if a card doesnt have this particularity then it 100% means that it's a fake

(Toei) episode 15: "Eerie Woman

With all that said, you will still see it in specific builds, including in Modern

Beware of The Tabernacle at Pendrell Vale, the single most expensive card on this list

Once per turn, during your Standby Phase, if your opponent controls more monsters than you do, you can destroy a number of cards your opponent controls so that your opponent will control the same number of cards as you control monsters