[Arryn]

I created a Crystal Matrix, and 2 Slave Matrices, but when they are appropriately equipped, I still cannot cast more difficult (global) rituals, nor is the displayed skill level of the master increased, unlike for other items that boost skill. Are these communion items only useful on the battlefield? (If so, they should say so.) And does it only work for astral magic? Any help in clarifying for me how these items are supposed to work is appreciated. Thanks.