This is primarily useful in black decks that focus on sacrificing their creatures, but it can still get some mileage from black decks that use other tactics
If your opponent doesn't have an enchantment or some other non-destructive effect to neutralize your newly-armored critter, then Mithril Coat makes your commander invincible
The best part about these two pieces is that your opponents dont get to draw cards alongside you (as most white draw spells make you do)
Ruxa, Patient Professor Ever want a commander of a vanilla creatures theme
In this case, you wont be able to play lands exiled with Kotis, the Fangkeeper
This multiplayer format is quite possibly the most unique compared to the other formats the game provides, featuring larger deck sizes, higher life totals, and more players to interact with in a given game