Attack modifiers

On Blizzard's site, it states that each orb in the game is considered an attack modifier, meaning it gives the hero a better attack while turning off their original attack modifiers like searing arrows, frost arrows, cold arrows.

I have 2 questions and they're both related to the WE since I'm trying to see which modifiers which.

Is the Mask of Death considered as an attack modifier, since Blizzard wrote (= mask of death) on their site?

Can someone list all the attack modifiers (not orbs, but abilities that came with the hero)

Appreciate any assisstance.

Knowing why you would need to know would give 1 - a clearer understanding and 2 - a motivation to do it.

Here's one of my examples.
I have a Pitlord who has creaving attack, mask of death, and a shadow orb +10. The want the mask of death to work since they shadow orb +10 deosn't really add any effect to the hero's attack except attributes.

Listing out all the attack modifiers would really help, if that's possible? This will help me better arrange which item goes where as slot 1 is the priority over the other slots to get the item's true effect (eg. splash dmg). Thanks.