Whenever you gain influence, something happens.
- Find more cards with Surge in its category page.
Surge was introduced in Argent Depths.
It was introduced in this article: https://www.direwolfdigital.com/news/argent-depths-surge/
Power is not influence, though most power cards give influence.
Some power such as Seat of Cunning give 2 influence for one power, which triggers Surge twice.
Nothing here yet!