Spawn

Spawning
Spawning is the method used to bring beasts from your hand into the Spawn Zone in the arena. Beasts may require a 'Spawn Cost' which must be fulfilled in order to Spawn them. A beast may only be Spawned once per turn unless another card's effect allows you to Spawn another beast. You may Spawn a beast through effect as many times as you wish per turn. If a beast is Spawned by another card's effect, you may Spawn them anywhere in the arena depending on that card's effect. However, when a beast is Spawned by another card's effect, that beast's Spawn Cost is invalid.

Respawning
When a beast is Spawned from the Grave by another card's effect, this is called 'Respawning'. The Spawn Cost is invalid if the beast is Respawned.