> For the complete documentation index, see [llms.txt](https://captain-tsubasa-rivals.gitbook.io/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://captain-tsubasa-rivals.gitbook.io/en/player-nft-and-training-functions/support-slots-characters.md).
# Support Slots/Characters
* Each player's Support Slot can be equipped with a Support Character to gain buffing effects during the game.
* To equip a Support Character, you must first unlock the Support Slot.
* There are a total of 8 support slots per player.
## About Support Slots
### Support Slot Types
Each player has 4 parameter support slots and 4 VS parameter support slots.
There are 4 types of parameter slots (Efficiency/Resilience/Luck/Proficiency) and 3 types of VS parameter slots (Toughness/Agility/Skill), each of which can be equipped with a Support Character of the same type as the slot.
### Unlocking Support Slots
Support slots can be unlocked once a player has reached a certain level by spending $TSUBASAUT.
The cost of releasing Support Slots at each level is as follows.
Player Level
Unlocking Slot Type
Support Slot Unlock Cost ($TSUBASAUT)
5
Parameter
20
10
Parameter
40
15
Parameter
60
20
Parameter
80
25
VS Parameter
30
27
VS Parameter
60
30
VS Parameter
90
30
VS Parameter
90
### Support Slot Rarity
* The Rarity of the Support Slot is determined by lottery when unlocked.
* There are five rarity levels, with rarity increasing from Common to Legendary.
* **Common / ****Uncommon**** / ****Rare**** / ****Epic**** / ****Legendary**
* If the rarity of the support slot is Uncommon or higher, extra effects will be added to the support slot.
* Once the rarity of the Support Slot is chosen, it cannot be changed.
## Support Characters
### Support Character Types and Usage
Support Characters are divided into two types: Parameter type/VS Parameter type.
* Parameter type: brings effects related to Parameters.
* VS Parameter type: brings effects related to VS Parameters.
Support characters can be equipped to the same type of Support Slots to bring buff effects during the game. There are two types of effects: additive/multiplicative.
**Examples of support character types**
### Levelling Up Support Characters
Support characters can be levelled up by merging three of the same type and level.
The $TSUBASAUT cost, success rate, and other conditions vary depending on the Support Character level.
* Merging Support Characters of levels 2-6 may fail to level up, but no $TSUBASAUT is required.
* At level 7 and above, level-up is 100% successful but requires a $TSUBASAUT cost.
| Character Level | Merge Cost ($TSUBASAUT) | Success Rate |
| :-------------: | :---------------------: | :----------: |
| 2 | 0 | 35% |
| 3 | 0 | 55% |
| 4 | 0 | 65% |
| 5 | 0 | 75% |
| 6 | 0 | 85% |
| 7 | 500 | 100% |
| 8 | 600 | 100% |
| 9 | 700 | 100% |
