Prerequisites:

Character must be 15th level or higher, A Sword Saint's "Focus" Class Feature, The "Eroding God's Style" feat, The "Caustic Form: Corrosive Malady" feat.

Benefits:

Once per Focus as Full Attack Action, all your strikes that deal acid energy damage through the "Eroding God's Style" now periodically do damage to the enemy at the start of his turn.

To remove this acid energy damage, the enemy must make a Heal check with a DC of 15 + 1 for every 2 points of acid energy damage affecting the enemy. This periodical damage ends once your current focus ends.

Example:

(You Full Attack Action an enemy, you deal a total of 12 acid energy damage with all of your attacks. The enemy now takes a periodical 12 acid energy damage at the beginning of its turn. The Heal DC to remove this periodical damage is 21).

Special:

This feat can only be used while in Focus and using the Eroding God's Style.