Tiers

Tiers, also known as rarities, are unit classifications that define how rare and powerful a tower is. There are currently a total of 14 rarities in the game, two of which have unique applications.
== List of Tiers ==
=== Common ===
Common is the lowest obtainable unit tier. This tier is host to many of the weakest units in the game. Despite this negative reputation, there are a handful of Common units that are helpful in certain applications.
A Common unit has a 78.87% chance to be summoned from the Tower Store. A few Common units may also be unboxed from certain crates. Common units cannot be bought from the Store.
There are currently 37 Common units, 35 of which are obtainable without needing to trade.
=== Rare ===
Rare is the second lowest obtainable unit tier. 
A Rare unit has a 16% chance to be summoned from the Tower Store. A few Common units may also be unboxed from certain crates. Rare units cannot be bought from the Store.
There are currently 50 Rare units, 49 of which are obtainable without needing to trade.
=== Legendary ===
Legendary is the third lowest obtainable unit tier.
A Legendary unit has a 4% chance to be summoned from the Tower Store, or it can be bought from the Store for 50 gems. A few Legendary units may also be unboxed from certain crates. There is only one Legendary unit (Akon) that can only be obtained through unboxing.
There are currently 37 Legendary units, 35 of which are obtainable without needing to trade.
=== Mythical ===
Mythical is the fourth lowest obtainable unit tier.
A Mythical unit has a 1% chance to be summoned from the Tower Store, or it can be bought from the Store for 150 gems. Some Mythical units cannot be summoned or bought, however, and can only be obtained either by unboxing their respective crates or through evolution.
There are currently 48 Mythical units, 42 of which are obtainable without needing to trade.
=== Godly ===
Godly is the fifth obtainable unit tier.
A Godly unit has a 0.1% chance to be summoned from the Tower Store, or it can be bought from the Store for 600 gems. Some Godly units cannot be summoned or bought, however, and can only be obtained either by unboxing their respective crates or through evolution.
There are currently 45 Godly units, 40 of which are obtainable without needing to trade.
=== Divine ===
Divine is the fourth highest obtainable unit tier. This tier is host to many strong units in the game.
A Divine unit has a 0.02% chance to be summoned from the Tower Store, or it can be bought from the Store for 1200 gems. Some Divine units cannot be summoned or bought, however, and can only be obtained either by unboxing their respective crates or through evolution.
There are currently 31 Divine units, 27 of which are obtainable without needing to trade.
=== Ultimate ===
Ultimate is the third highest obtainable unit tier. This tier is host to some of the most powerful units in the game.
An Ultimate unit has a 0.01% chance to be summoned from the Tower Store, or it can be bought from the Store for 4800 gems. Some Ultimate units cannot be summoned or bought, however, and can only be obtained either by unboxing their respective crates or through evolution.
There are currently 25 Ultimate units, 20 of which are obtainable without needing to trade.
=== Arcane ===
Arcane is the second highest obtainable unit tier.
At the moment, there are no units that are Arcane. However, a unit can become Arcane through sacrificing.
=== Celestial ===
Celestial is the highest obtainable unit tier.
At the moment, there are no units that are Celestial. However, a unit can become Celestial through sacrificing.
=== Secret ===
Secret is a special obtainable unit tier. Secret units are not acquired by the Tower Shop, Store, nor crates, but rather unique means.
There are currently 4 Secret units, 2 of which are obtainable.
=== Event ===
Event is a special unit tier.
There are currently 9 Event units, none of which are obtainable without needing to trade. There is only one Event unit (Christmas Spidey) that cannot be traded.
=== Youtuber ===
Youtuber is a special unit tier given to units who are based on Roblox YouTubers.
There are currently 25 Youtuber units, none of which are obtainable. Interestingly, despite Youtuber units not appearing on the banner, they cannot be traded.
== List of Unique Tiers ==
Unique tiers do not replace a unit's tier, but rather accompany it. For example, Christmas Greybeard is a Limited Divine-tier unit, not just a Limited unit. 
=== Shiny ===
Shiny is a unique obtainable unit tier. Any Rare or higher-tier unit summoned from the Tower Shop or bought from the Store has a chance to be shiny. Secret, Event, Youtuber, and most Limited units cannot be Shiny.
For more information on the importance of the Shiny tier and how it affects units, visit the Shiny Units page.
=== Limited ===
Limited is a unique obtainable unit tier. It is most often given to units that are available for a limited time. Interestingly, it is also given to a handful of units that can only be obtained through unboxing. 
There are currently 36 Limited units, 13 of which are obtainable without needing to trade.
Prestige is merging units. Every prestige will have a chance to fail after Prestige I, with the chance of failing increasing every prestige. You can get a guaranteed Prestige V by only merging units of the same prestige level into each other, however, this requires 16 units to accomplish. When merged the units' damage will increase by roughly 10%. Only the same unit can be merged into itself. 
== Removed Tiers ==
=== Epic ===
Epic used to be the fourth highest rarity in the game but was removed for unknown reasons. Most epic units just got switched to rare or legendary units.
Uncommon 
Uncommon used to be the second highest rarity in the game but same with epic it was removed for unknown reasons. Most uncommon units got switch to common or rare units.
Category:Features