# Collection buy-back system

Collections are formed inside reservoirs, by Tiers, and each collection is assigned its own grade - from <mark style="color:orange;">**Bronze**</mark> to <mark style="color:yellow;">**Gold**</mark>. In the Phase I, only lake and river collections of the <mark style="color:orange;">**Bronze**</mark> and <mark style="color:blue;">**Silver**</mark> grade will be open for purchase. Please note, in the early stages developers will buy non-NFT collections; moreover, it will be possible to sell the collection of each Tier separately, and not accumulate the entire collection, as is planned in the later stages of the project’s development.

## Phase I

{% hint style="danger" %}
Keep in mind that one player can claim only one collection per week. Choose carefully what collection you are eager to claim. One collection is able to be claimed only once in 24 hours for all the players.
{% endhint %}

### How it works?

<figure><img src="https://1866468859-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdImM5xgJjySUkyuXP23B%2Fuploads%2FW7eeGl44PfTnquz3YZJw%2FTable_Back_2.png?alt=media&#x26;token=1770f583-82fb-4b65-90a1-b3218a7241f3" alt=""><figcaption><p>Lake collection non-NFT buy-back</p></figcaption></figure>

<div data-full-width="false"><figure><img src="https://1866468859-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdImM5xgJjySUkyuXP23B%2Fuploads%2F62z7GYFYjwNx5WFSTJp0%2FTable_Back_1.png?alt=media&#x26;token=54044f66-e695-4b2e-8b5c-f00fc60efcc8" alt=""><figcaption><p>River collection non-NFT buy-back</p></figcaption></figure></div>

Right after launch of buy-back system the costs of collection will also be formed by 50% of the in-game **Baitcoins** spends.
