Consume Life (Su)
Source: Advanced Class Origins, p. 7
Replaces: Consume Spells
By wresting a soul from life to death, a twilight sage gains a slightly deeper understanding of mortality, fueling her curiosity and eldritch power. As a full-round action, she can consume the life energy of a helpless living creature, killing it.
This creature must have 2 or more Hit Dice and be below 0 hit points. The twilight sage adds 2 points to her arcane reservoir if the creature’s Hit Dice equaled or exceeded the sage’s character level, or 1 point if the creature’s Hit Dice equaled at least 1/2 her character level. This ability is a death effect. This ability replaces consume spells.