Source: MMOWTS
One of the most important parts of Final Fantasy XIV: Endwalker's patch 6.25 is the introduction of Variant Dungeons, which a little bit similar to older duties before, each of these dungeons tasks players with exploring mysterious multiple paths and fighting dangerous enemies. Besides mastering a whole new system, Variant Dungeons have multiple difficulty tiers as well, and here is everything you need to know about this new dungeons.
Variant Dungeons are duties players can run solo or in groups of up to four players. To start, you'll need need at least one job that has reached level 90, and the minimum item on level 575. A characteristic trait of these dungeons is their branch system, which presents you with multiple routes, each one including different enemies and scenarios.
Every time you complete a different path, you'll receive new pieces of information regarding the place's lore. This info is registered in the Survey Record, which can be accessed on the V&C Dungeon Finder menu. Since paths change depending on the choices you make, you'll need to farm Variant Dungeons a lot times and explore different choices to have a complete experience and get FFXIV items.
There is a new interesting system in Variant Dungeons that I have to mention: Variant Actions. Basically it is when you're in Variant Dungeon, you'll have access to a set of skills meant to compensate for the lack of one or another job in the party, which brings a lot of uncertains to the gameplay.
In case the endgame players are looking for bigger challenges, it's not a problem as well. Once you complete Variant Dungeons, you'll unlock Criterion Dungeons, basically the highest level version of the Variant Dungeon.
Criterion Dungeons come with much stronger enemies and a more complicated system. In contrast with its easier version, parties can have only one tank, one healer, one melee DPS, and one physical or magical ranged DPS. Besides that, players can only be resurrected with the Variant Raise II skill.
That is basically the general guides on the Variant Dungeons, if you want to know more about the updates on patch 6.25 in Final Fantasy XIV, keep following out infomation site MMOWTS.