Old school sigil of purity: 60% chance on hit to remove a condition (cooldown: 10s)
The new fangled sigil of generosity: 60% chance to transfer a condition to your foe on critical hit (cooldown: 10s)
Yes, purity is on hit instead of crit, but since it only cleanses a condi and doesn’t transfer it like generosity, maybe the CD should be more like 5 seconds.
Sizzap – Asura Mesmer, Dragonbrand