Curses the target with agony, causing X Shadow damage over 24 sec. This damage is dealt slowly at first, and builds up as the Curse reaches its full duration. Only one Curse per Warlock can be active on any one target.
All warlock damage-over-time (DoT) spells will benefit from crit and haste innately. Haste will no longer act to reduce the DoT's duration, but rather to add additional ticks. When reapplying a DoT, you can no longer "clip" the final tick. Instead, this will just add duration to the spell, similar to how Everlasting Affliction currently works.
So, how does Agony work in Cataclysm? Will it start over completely after the final tick?