If the option to install the PTR isn't showing, it means you either don't have a standard game account, or there is no PTR for this game at this time.

Above the Play button, select Public Test Realm.You can install the PTR directly through the app. To install the PTR, you must first have a standard game account. For World of Warcraft, your account must be a full account, can't be a Starter Edition account. With that out of the way, here are the things that you need to sacrifice to unlock the seals in Patch 2.7.The Public Test Realm (PTR) is a special service you can use to test game updates before we release them to the public. As you can tell, these items are hard to come by, so unlocking these Legendary Potion Powers may take a lot of time to accomplish. For those who don’t know, Primal Items in Diablo III are improved versions of Ancient Items with perfectly rolled stats. To get these, you must salvage a Primal Item for 55 Primordial Ashes. Now, to unlock the Legendary Potion Power, you must sacrifice a number of Primordial Ashes. The sacrifice requirements get a bit more demanding as you go down the tree. Just get some normal rarity gear and salvage them via the blacksmith. The first seal, for example, needs you to sacrifice 10 Reusable Parts, which is actually quite easy to do. To unlock a seal, you must sacrifice whatever items the altar requires of you. These things provide different bonuses, so unlocking them makes your Diablo III character much more powerful. Basically, the idea here is that there are 26 icons called Seals and another three Legendary Potion Powers. The Altar of Rites looks like a complicated skill tree but it’s actually simpler than you think.

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