How do I kill constructs?

[Buddha5440]

Arcane Archer with Morphic Arrows (switch to Aligned Arrows for Marut), Force imbue III, and a dual augment bow with Force or Light and Construct Bane, slotted with cold and Ruby of Adamantine Arms for the win.

 

[l_remmie]

If you want to be a flavorful construct killer you have to play an artificer and probably the caster variant. You get all the rust dmg spells for free (no spell slots needed), have anti construct abilities and can provide all your buddies with adamantine weapons.

 

[cdbd3rd]

....Do I need favor to buy it? Wiki says purchasable in House C.

No favor needed. Turn right as you eneter House C, down a few stairs. Scroll vendor there.

https://ddowiki.com/page/Item:Scroll_of_Adamantine_Weapons

 

[Livmo]

No favor needed. Turn right as you eneter House C, down a few stairs. Scroll vendor there.

https://ddowiki.com/page/Item:Scroll_of_Adamantine_Weapons

That's usually where I purchase on my non-arty builds to buff the group/raid.

Regarding favor I find the House C quests a good source of XP at level 18. And I stock up for crafting later, https://ddowiki.com/page/Favor#House_Cannith. I mostly get the Mark of House Cannith on the cheap aside from the XP pots.