Of course, this card goes best in decks that want to disavow the one land per turn limitation via cards such as Uro, Exploration, Azusa, Risen Reef, or any other land-ramping cards that run rampant through Commander
Bloodhill Bastion If youre here, then get ready to fight and be smacked
There are plenty of ways to find a way to untap the equipped creature, to equip for free, or other nonsense than can make this part of multiple game-winning combos
Its easy to have Mondrak be indestructible and that much harder for opponents to get rid of it if you play it at the right time
There is no point where its horrible, though three mana for a single 2/2 vigilance is below the curve
The protection the sword gives means that not only can your opponent not target the creature with spells and abilities, much like Hexproof, but also means that their creatures, planeswalkers, and other permanents cannot interact with it either