You do have emotes where you can congratulate an opponent on a win and other such one liners, but generally even though the game is called MTG: Arena and it is an online game with real life opponents, as you play you barely even make that connection
T'Challa is a three-mana (1W, 1U, 1C) 3/2 legendary creature with Flash and lets you draw a card whenever a player draws their second card of a turn
One Piece is by no means a small franchise, being one of the longest-running and most popular Japanese anime and manga series of all time, but I doubt any would have expected the truly meteoric rise that the One Piece Card Game has seen over the past year or so
Batterskull is also from Mirrodin, or rather, its New Phyrexia version
We will be building around a certain Oath of the Gatewatch card, which seems like it was designed specifically for Against the Odds