A common name for the 
Enhanced Combos awoken skill, which doubles the damage of the individual card upon hitting seven or more combos,and stacks for each awakening, dealing 2n times the damage (where n is the number of awakenings on that card). This can also stack with other awakenings such as 
, although this is not very common.
For example: Uranus
has three Enhanced Combos awakenings, so after matching seven combos, he will gain a personal 8x ATK multiplier.
Omega
has an Active Skill spike that increases damage based on how many you have on your team!
For a list of cards with the Enhanced Combos awakening (or any specific awakening), simply click on one of the awakening icons!