Unit/Rarity

Units come in four (unofficially five) rarities: R, SR, SR+ (officially referred to as Elite), SSR, and UR (both Commander and Champion units).
Rarity should give a good idea to the player on how available these units are, and subsequently how easy it is to upgrade them.
==R (Rare)==
 R units are the easiest to obtain in the game. They are highly accessible in various parts of the game, most significantly in the Silver Altar.
Once an R unit is recruited, it is very easy to upgrade it via the Barracks system. Also, R Unit Souls can be obtained through Premium Cards.
Examples of R units include:
		
==SR (Super Rare)==
 SR units are the second most common units. They are practical to obtain and significantly upgrade even for F2P players.
The most reliable sources for SR units are the Underground, and various Marketplace Stores (though the reliable units are those that don't rotate on store refresh).
Once an SR unit is recruited, it is relatively easy to upgrade it via the Barracks system. Usually, players can focus on only one or two of them at a time due to a higher scarcity of resources. SR Unit Souls are another way of obtaining these units.
Units of R rarity become SR when developed to 6 Star Soul Awakening.
Examples of SR units include:
		
==SR+ (Super Rare+)==
While the game theoretically treats these units the same as regular SR units, there are two important differences:
* (Almost) all of them are only available to recruit by purchasing them with real money (not Diamonds).
* Most of them require 80 instead of 30 tokens to recruit.
Once an SR+ unit has been recruited, the only reliable source for upgrading it is in the Barracks.
Notice that nowadays there are two main ways via which free-to-play players may hope to obtain SR+ units unreliably:
* Elite Unit Souls (currently obtainable via Dusty Treasure Map random reward and Auto Chess store).
* Lucky Hour event.
* Holy City Siege Soul tokens rewards.
* Kingdom Championship Soul tokens rewards.
Examples of SR+ units include: 
		
==SSR (Specially Super Rare)==
 SSR units are theoretically the most difficult to obtain.
However, unlike SR+ units, F2P players may also obtain copies and upgrade them reliably due to availability through several means for Diamonds.
The primary sources for SSR units are: 
# Gold Altar. SSRs can be pulled from this game mode, but it may take many pulls to get one and which unit you will receive is random. 
# Limited Time Recruitment Alters. This is the most reliable to obtain a specific unit but is also more expensive than other sources of SSRs.
# SSR Unit Souls. These can be obtained in various ways such as from Premium Cards, Pandora's Box, or Kingdom Championship trials. The SSR obtained through this method is random.
# One time offer for a random SSR in Treasure Store for the cost of 8K.
Units of SSR rarity become Starsinger when developed to 6 Star Soul Awakening.
Examples of SSR units include:
		
==UR (Ultimate Rare)==
 UR units are the tight source units in the game.
Despite their rarity, absolutely all UR units can be purchased from Limited Time Covenant in a timespan of 10-12 weeks, so players may have seen all UR units in the game in 3 months, but still be unlucky enough to get the much needed SSR unit. Even though their power is hard to compare, both Commander and Champion units are UR.
Regardless, obtaining UR units is the most resource-consuming recruitment in the game: 16.2K for a 3⭐Unit.
Currently, this class is under development and none of the units has any type of Awakening or Exclusive Weapon.
===UR (Commander)===
Each Faction has one Commander Unit who buffs and enhances the abilities of all the units among theirs, through Domain. This includes the Altered versions of them.
On themselves, they are considerably weaker than their Champion counterparts, but they greatly synergize when they are all fully developed.
Examples of Commander units include:
		
===UR (Champion)===
Multiple Champion Units are available for each Faction. After reaching 6⭐, Champions will create a mutual synergy with a specific unit among their faction, which can be of SSR or UR rarity. When both units are deployed on the battlefield they will share buffs and/or buff each other. For example, Dark Elemental will Dark Mark, while Light Elemental will Light Mark enemy units. In certain conditions, the two Conflux Champions will cooperate to eliminate a common target through their Clashing Coexistance skill.
Examples of Champion units include: