This roll does not count as an action. Experience Point costs are dealt with on page 155 of the Tribe 8 Rulebook, but they are not the only requirements. Any form of new knowledge of Synthesis requires some form of enlightenment or improved understanding of spirit and dream. The new ability might even be granted by or stolen from that entity. Tribe 8 Rulebook, pp.
Aspects require a tutor unless they are granted by a spiritual entity.
Note that Tribal characters usually receive Aspects or increased Synthesis as a direct gift from their Fatima. This is what makes using Synthesis against Z'bri or in Z'bri lands more difficult. These problems can be offset by attacking in large numbers or by using Synthesis on objects that are then used against the Z'bri rather than affecting them directly. The Fatimas, Sisterhoods and the hidden Marians know rituals to consecrate ground so as to purge it of Z'bri influence - hence when led by a Fatima, tribals are rarely considered to be in Z'bri lands. Another important defense against Sundering is to deprive a Z'bri of the emotional reactions they depend on.