The drawback here is that they still retain the one power, but in most cases that will be a hell of a lot better than what they were (unless its a token army)
The card this styles is so heavily played at the kitchen table that we have 63,389 decks registered with it in them over at EDHREC.com
Numbers and cards featured change between pack types (Draft, Collector, Set, etc.), but some number of Commons, Uncommons, and Rare cards have traditionally been featured
Just an Opt on your turn will net you a free Drake
Sutured Ghoul 3 For a full on combo approach you can use this bad boy with some other bits and bobs so as to one shot people
ILLUSTRATOR Glen Angus LEGALITIES Standard Future Historic Timeless Gladiator Pioneer Modern Legacy Pauper Vintage Penny Commander Oathbreaker Standardbrawl Brawl Competitivebrawl Alchemy Paupercommander Duel Oldschool Premodern Predh Tlr LANGUAGES DE EN ES FR IT JP PT RU ZH-CN ZH-TW RULINGS 2021-03-19 Because delve isn't an alternative cost, it can be used in conjunction with alternative costs, such as flashback
