I was thinking, we should have DC like runes in emod. on how the DCs work:
for instance you want to do "Aegis of Entropy" which requires fortitude 3 and Mortis 1
He equips a Fortitude rune, and casts it, each cast increase the level of the rune. for instance:
you get a fortitude rune of Lv.1 and you fortitude level of 4. if you cast the "rune upgrade discipline" 3 times, then the rune will be fortitude level 3. but if you do it 5 times it will give message that you do not posses Fortitude Lv 5. you do the same with mortis. and then you equip you lv 3 fortitude rune and you mortis rune, and cast "rune activate discipline" and the runes will invoke that "aegis of entropy"
this is just Food for thought, I just came up with it as i was going trough my "Guide to High clans" again.
this can go well for things like "Armory of the abyss" (potence 3 + obtenebration 3) which can summon a abyssal black ainkurn sword which you can use as long as you dont enter torpor.