Slay the Spire 2 uses its NodePool class to pool the instantiation of commonly reused models, such as NCard. While additional types of node can be registered with it, they are required to be instantiated directly from a scene. If you want to pool a node created through code, you can utilize the methods in the GeneratedNodePool class instead. This will still add to the original NodePool class.

When using a pool ensure that instances of your class are freed when no longer in use. Generally if your node implements IPoolable, you always use NodePool.Get<NodeType>() to obtain new instances, and your node is always removed from the scene tree through MegaCrit’s extension methods defined in GodotTreeExtensions like FreeSafely that should be enough. These extension methods return any IPoolable removed from the scene tree to the pool.

Stub; requires details.