Whenever an enemy dies, Yog-Sothoth instantly restores a certain amount of mana. (This effect can only trigger once per turn.)
After matching 20 runes of the same element as a hero in your team, the board will generate 1 Dreamer Rune. Match the Dreamer Rune to heal all allies for 10% of their health. (When defending, all allies will be healed for 10% each time this hero attacks a total of 5 times).