http://www.w3.org/ns/prov#value | - Of course, if magic items are a limited resource in your game, the paradigm changes somewhat: Fell Flight becomes absolutely necessary to take once again (because you can not replace the invocation with magic items), and any way to actually gain more invocations known is a welcome addition, but even then, cost-effectiveness has to be looked at closely; for example, if an 11th-level Warlock scrimped
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