Yes, this card costs 12 mana, but its a great inclusion in decks with ways to cheat out creatures for a sneaky win
That's not helpful, but it's also not a showstopper
Protection makes it so the equipped creature can't be targeted, blocked, or dealt damage from anything except for colors in your commander's color identity, which lets it get in for much more damage
We have a lot of payoffs for doing this, so a land like High Market in our land base that can sacrifice something without ever having to cast a spell does actually sound quite good
You can only turn a manifested creature face-up for its mana cost
Kardur was one of the fiercest demon jarls, inspiring terror in the hearts of other demons