Companions, right
Zul Ashur, Lich Lord Zul Ashur, Lich Lord is the kind of commander you play because you have an interesting synergy in mind, like looping Sidisi, Undead Vizier or annoying your opponents to death by playing Fleshbag Marauder turn after turn
Shagrat, Loot Bearer Shagrat, Loot Bearer could make for a good Voltron commander that can easily equip expensive artifacts to itself
There are three dungeons you can adventure through while playing a normal game, with certain cards inviting you to 'venture into the dungeon.' This essentially means start a dungeon if you haven't already or advance if you have
You may need to do some punching in combat to get all the way to the finish line, but Syr Konrad definitely helps
This leaves Arcades, Chromium, Nicol Bolas, Palladia-Mors, and Vaevictis, who were all minted for the first time in Legends