(Example)

Future expansion Drg: Dragonfire system
As of 7.0 dragonfire activates (your fang system) but changes vaporal thrust and disembowel into .....or changes gierskogul in a new melee variant of a new lore important (hyrasvalgur: nidhoggs brother)<- don't spell check me, dragon lol. I'm being silly ^_^

See and nothing else changes.