I also made a deck (less expensive haha) of Chatterfang, and I would suggest you to add Spawning Pit which is really strong with drain card like Bastion of Remembrance, Zulaport Cutthroat and Blood Artist (which are the main wincon in my deck)
If it happens to deal combat damage to you (usually due to a redirection effect, which would be unusual), the ability won't trigger
you can just kill the 8/8 then leave your opponents with an annoying choice next turn: Do they take 10 damage or block and trigger a bunch of fights
I really hope this is not the new normal: low-value Secret Lairs with a small chance at opening an exciting card
Battles can also happen outside of the Gyms whenever a fellow player invites you to participate in one
Vihaan, Goldwaker What makes Vihaan, Goldwaker such a great Mardu commander is its ability to turn Treasures into a mighty army of 3/3 construct assassins until the end of the turn