[rtyffg]

Stone\iron skin does not fit for satyrs, but some more powerfull beings like minos (and maybe pans) seem fitting to it for me (at least, pangaea is greek in some ways, and some mythic greek heroes seem to have ironskin analogues).
Some presumptions at this point: Since such ritual includes giving power through enchanted blood, then it should apply in different ways, based on second school used (Something simular to appropriate bless). Like blood-nature spells resulting in berserk and regen, blood-earth giving hard skinned troops with reinvig, but losing berserk of "basic version", blood-death resulting in poisonous/leprous creatures (seems fitting for harpys only). Will try to mod and see which spells of "empowerment" category actually fit.