# Catching Monsters

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**Monster Species**

This is algorithmically determined by the block hash and completely beyond the control of game developers since no one can predict the block hash before the block is mined.

**Valid Catching Time**

The monsters that appear are only valid within 200 blocks, and if not caught, are gone forever.

**Minimum Catching Power (CP)**

* The Minimum Catching Power is the amount a player is required to pay in order to catch a monster.
* The Minimum Catching Power scales with genus groups; rare Monsters will require a higher catching power.&#x20;
* The Minimum Catching Power increases periodically based on the total Monster population and can be subject to future governance.
* Players pay for Catching Power by in-game currency Energy

**Available Amount**

There may be more than one Monster (of the same species) available to be caught on a catch block. If that available amount drops to 0, any transaction sent to catch the Monster in that block will be reverted.

**Success Rate**

Not every attempt at catching a Blockchain Monster will be successful. The success rate represents the chances of catching a Monster. If the player fails to catch a Monster, the dedicated Energy will still be deducted. Chances of successfully catching a monster are not impacted by the monster’s rarity, although the rarer the monster, the more energy is required to increase the catch rate.

**Catching Booster**

There is a base catching success rate for each species. Players can further increase the success rate by using more Energy as ‘catching booster’.

However, the maximum success rate achieved by additional Energy usage is 75%. The other 20% is contributed by the BCM Assistant and the last 5% is rewarded if the monster's chain matches the player's chain.

**BCM Assistant**

***Element Support***

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You need to hold a monster of a particular type to catch the monster inside the metaverse. For example, to catch a fire monster, you need to bring a water genesis monster. Please refer to the chart above to see the element power proposition.

***Genesis Support***

To further increase the chance of catching Monsters, the player can bring a Genesis Monster into metaverse that matches the required elemental type.&#x20;

&#x20;      \- GS1 monsters: the success rate is increased by 10%

&#x20;      \- GS2 monsters: the success rate is increased by 20%

**Monster Stats and Perfection Levels**

Each Monster’s battle attributes vary and are random at the time it is caught. Monsters caught from the same block are always of the same species, but will have different stats and perfection levels.

**Blockchain World Difficulty**

The Minimum Catching Power and success rate will be adjusted over time to ensure a balance between supply and demand.
