How much do Knowledge skills cost for ally spirits?
Knowledge Skills have the default cost for any skill (5 Karma at ally creation). Ally spirit powers can be chosen from any powers available to spirits the initiate’s tradition may conjure. If the initiate knows Invoking metamagic, are the powers available to great form spirits available as ally spirit powers? No. Great forms are not part of the basic spirit types a tradition can conjure, they are enhanced forms of the basic spirit types. (ie. “read spirits his tradition can conjure” as “basic spirit types his tradition can conjure”). Only the five basic spirit types a tradition invokes (per the tradition’s correspondences) count in this regard.