Before I jump to juicy specifics, like changes to Axe and Cheating Death, you should know that Artifact is offering a one-time buyback on the eight cards that were rebalanced with the Build Your Legend update.
Check how to sell the aforementioned cards and other details at the official support page. Now back to the changes and features. The main features of the update are the following:
VALOR AND SKILL ARE REWARDED
Every matchmade game in Artifact grants XP used to level your account and unlock more content. Reaching certain tiers grants level icons to show the world what you've accomplished, while others grant card packs or tickets (up to fifteen of each this season).
If you win three games in a week, you will be awarded a significant XP bonus. Whether you want to draft, play a Call to Arms game, or try out a new constructed deck doesn't matter — any win in a matchmade game will move you closer to the bonus.
Additional XP can be earned every match based on how you play. Did you fully equip all of your heroes? Maybe you managed to win without using a single healing item. There are dozens of available bonuses and you can earn up to three each match.
RISE ABOVE THE CROWD
Ranging from 1-75, your Skill Rating is a reflection of your rising mastery of Artifact. At the start of each season, every player starts at Skill Rating 1. Over the season, every victory against an opponent with a higher Skill Rating will raise your own.
Some players look to bring a finely-honed constructed deck into a game, others prefer to build one on the fly in draft. Independent constructed and draft skill ratings let you claim your kingdom, or vie for both crowns.
During a season, once you've earned a skill rating, you'll never lose it. In a few months, a new season will begin, and ratings will reset – giving you a fresh opportunity to prove your skill.