# 🔁Become Active/Subtitution Rules

Swapping allows you to change which Starlight is currently active on your field. There are two primary methods: Basic Swap and Substitution, each governed by specific rules and limitations

### 🔁 Basic Swap Method

1. Discard cards from your hand equal to the Rank of the Starlight you wish to activate.
2. The current active Starlight and the new Starlight will exchange places.
3. You cannot activate a Starlight if its Rank is higher than your currently unlocked Rank.

### 🔄 Substitution

Substitution occurs when your active spot is empty, and you need to send a Starlight from your field to the active zone.

*  No discard is required.
* This is typically used when your active Starlight is defeated or removed, and no automatic replacement is triggered.

{% hint style="warning" %}
Keep in mind that a starlight can't become active if it rank is superior to the actual [unlocked rank](/complete-game-rules/rank-unlock-system.md).
{% endhint %}

***

### 🧩 Swap Categories

✅ Normal Swaps

* Basic Swap: Manually exchanging your active Starlight by discarding cards.  
* Substitution: Filling an empty active spot with a Starlight from your field.

**⚠️ Non-Normal Swaps**

* Swaps triggered by card effects, such as team replacement abilities or special mechanics. 


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