Promos are cards from the main sets, but with different stamps, foiling, art, and borders
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
You also get Alpine Moon, which you can protect against Tron and use to reasonable success against Amulet
You have to play with that information in order to scare them into doing certain moves or misunderstanding what you are ramping up to
Bulk 50x Scarlet & Violet - Destined Rivals When you buy Pokemon TCG Live codes in bulk, it brings the price per code slightly lower
Or if you want the Treasures, throw it to a Momentous Fall to gain 20 life, draw eight cards, and make ten treasures, all for just four mana