The buildaround for this week (18th to 25th of March) is Powerstone Compass. It is a very clunky, but still kind of decent win-condition or rather win-condition enabler for control decks with a lot of damage spells, of which primal has a lot. I decided to go for the Elysian route, the 2 main reasons being the relic synergy package, most importantly Gemstone as market access for Powerstone, and Temporal Distortion, which basically allows you to just continue your turn on your opponent's turn. As a wise man once said, there is a finite amount of fun to be had in a game of Eternal and I want all of it.
The general idea is to control the board while ramping with your Powerstones, Gemstones and Call for Aids until you get the set-up of Temporal + Compass (sometimes one of them is enough). Usually you should get Temporal first because the extra power on the opponent's turn can help you to protect it and then later Compass from relic removal (with Display or Cirso's Choice, both of which you can also get back from your void with Prodigious Sorcery). After you have both in play, it's very difficult to lose unless your opponent has too much relic removal or a blowout like
Vara, Vengeance-Seeker +
Silverblade Menace. Some Combo decks can also still beat you, but Arcane Restraint should help against them.
I think this is one of the better brewlette decks and it's quite cheap if you have the campaigns for it, but I would still advise to not craft this if all you are looking for is an efficient ladder grinder