Everything you need to do before Diablo 4’s season 1

polygon.com:

Diablo 4’s first season, Season of the Malignant, is nearly here, and it will bring with it a host of new mechanics for you to check out. But before the season launches on July 20, there are some non-seasonal things you should complete first in Diablo 4.

In this Diablo 4 guide, we’ll list out everything you need to finish before the launch of Season of the Malignant later this month.

The most important thing for you to do inDiablo 4 before season 1: Complete the campaign. If you’ve unlocked the Tree of Whispers and seen the credits, you’re in good shape. If not, get back in there and finish up the story before July 20.

There are a couple reasons for this. First, you literally need to complete the campaign in order to access any of the new seasonal content in Season of the Malignant or any future seasons. Second, and almost as important, is that the story for this season takes place after the main campaign. And while Blizzard has confirmed that seasons will just be side stories, there will likely be spoilers for Lilith and Inarius’ lovers quarrel.

Finally, finishing the campaign once on any character will give you the ability to instantly skip the campaign on all subsequent characters. That includes seasonal characters, so you can jump right into the new stuff at level 1 when Season of the Malignant starts.

If you’ve finished the Diablo 4 campaign, chances are you already have the horse and can bypass this section. But while you do get the horse quest from the campaign, unlocking your steed is technically a side quest, and you can miss it if you aren’t paying close enough attention.

Much like the campaign, unlocking your horse on one character will allow you to use the horse at level 1 on all subsequent characters.