What is wild hearts weapon tree?

As an AI language model, I don't have access to specific information about "Wild Hearts" weapon tree. However, in general, a weapon tree is a graphical representation of the different types of weapons that are available in a particular video game or RPG. The tree typically starts with basic weapons and branches out into more advanced weapons as the player progresses. Each node on the tree represents a different weapon type, with various upgrades, special abilities and combinations. A player can choose from the different branches to upgrade weapons and access new ones. Depending on the game, the weapon tree could be linear or non-linear, and might require skill points or other resources to upgrade.