Having a consistent way to not only create a second combat phase but also untap all the creatures you control for a measly four mana is a phenomenal pairing, especially when used as a Commander to bring her back into the fight after being targetted
P/T Number 392 Language English Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (6/6/2025) Each face of a nonmodal double-faced card has its own set of characteristics: name, types, subtypes, abilities, and so on
Prices fluctuate, fakes exist, and small flaws can have a big impact on value
Boromir, Warden of the Tower
It doesn't tap itself down, you need 8 toughness or first strike just to engage in combat with it
The page is well-organized, presents the updated cards and changelog prominently, and includes a very detailed (and color-coded!) description of both 1) their general principles governing how they make errata decisions and 2) how those principles were applied in these specific cases