Card boxes are the standard for people with large collections
The Dalmatian puppies introduced in this deck offer some delightful new play options, including the opportunity to add 99 copies of Tail Wagger to your deck (you'll need to buy 94 extra copies if you want to make it happen, though)
The other keywords are nice, but Hexproof is where its at
If the target creature is already tapped as Tranquilize resolves, you will still put three stun counters on it
Steel doesnt really do a whole lot alone, its bad at questing, but when its combined with a quest-heavy ink, it really makes it hard to interact with your deck
I'm probably going to have at least two of the decks built for the event (with two of the higher-ranked Companions, of course), but I could miss wildly on what I think is good and what isn't