This ability is incredibly powerful, but Kroxa and Kunoros come with an appropriate mana value
This isnt useful in any situation other than wanting to gain a lot of life, or occasionally kill someone off, but if you can get enough mana, then you can sometimes win a game outright without even really trying
Traverse the Outlands seemed so broken to me when it was first spoiled
So, the companions are legendary creatures who begin outside your starting deck and have great influence over the rest of your deck
I pass the trays around and allow other players to borrow dice or tokens if playing with friends, but you should obviously follow your comfort level for this
Akroma's Memorial is by far the best card for this, though, as it gives everything flying, first strike, vigilance, trample, haste, and protection from black and red