Skill points and specialization choice
Rook buys connected skill nodes with skill points and can activate one specialization at a time; the guides also describe refunding individual or all points.
How it works
IGN says a skill must connect to the one being purchased, each orb costs one skill point, and selecting a specialization costs nothing. Only one specialization can be active at a time. IGN and EIP describe refunds; EIP says they can be done for free, individually or across the full tree. It also says prerequisite skills must be refunded from the end of the tree backward.
Read the supporting references
A source-bounded reference to Rook’s classes, specializations, named abilities, skill progression, and equipment advancement. Steam metadata establishes identity only; mechanics come from s1–s4. This is not a complete inventory or a current-meta assessment. Guidance explains the referenced mechanics; it is not a tested damage ranking. Check the stated edition and source version before applying a patch-specific detail.