Combat trick, commander-saver, and many other things we need it to be, the Mithril Coat is the iconic piece of Equipment in the story
Furthermore, it makes interaction difficult for opponents because they have to sacrifice a Food to target it, meaning that any creature or actual Food tokens must be used - but this also buffs Ygra before the interaction spell resolves, as the effect goes first on the stack
Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle
Pay attention to the missions and go back in a few times with auto-built decks to earn more moolah for opening packs later
One of the most important rules in Commander is color identity, which dictates that cards in a deck must share colors with the deck's commander
Mox Ruby gives you Red mana, and has been used in a plethora of decks since they were released