Mastery: Essence of the Viper now increases all damage you deal by 8% (down from 20%). Each point of Mastery increases elemental damage by 1%, down from 2.5%.

专精：毒蛇精华现在增加你所有的伤害8%（从20%下调），每点专精点数增加元素伤害1%（从2.5%下调）

youdao

Elemental damage: Improves the Arcane, Fire, Frost, Nature or Shadow damage of abilities like traps, Black Arrow and Explosive Shot.

元素伤害：增加例如陷阱、黑箭、爆炸射击造成的奥术、火焰、冰霜、自然与暗影伤害。

youdao

Elemental damage has been reduced, the Dark Wood Grain Ring is no longer as powerful, and various other noticeable and less noticeable changes have been made.

FORBES: 'Dark Souls' Artorias Of The Abyss DLC Goes Live Today, Plus New Patch 1.06

The combination of weaker items and elemental damage, which makes the game harder, and more warps which make the game a bit easier, is a sensible and welcome one even if it does mean some of your favorite items are no longer quite as good.

FORBES: 'Dark Souls' Artorias Of The Abyss DLC Goes Live Today, Plus New Patch 1.06