Path of Exile

Dexterity based Spell gem.

Grants a buff giving more poison damage and a chance to inflict poison. When you poison an enemy while you have this buff, you gain Virulence, and summon an Agony Crawler minion that uses projectile and area attacks. You will lose Virulence over time, at a rate which increases the more Virulence you have. The minion will die when you have no Virulence.

Additional Effects per 1% Quality:
Buff grants 1% chance to Poison on Hit