Palladino is an NPC in Warframe that you first meet during the Chains of Harrow quest. She also performs a very important function for players, as she can provide you with one Riven mod a week.
Palladino can be found at Iron Wake, on Earth. Iron Wake is a Steel Meridian outpost that you will first get access to during the Chains of Harrow quest. Once the quest is completed, an Iron Wake node will appear on the navigation map of Earth, and you can visit it whenever you wish.
What does Palladino do
Palladino’s primary function is during the Chains of Harrow quest, as she instructs you on the step you need to take during the quest. When that is complete, she will sell an item called Rell’s Donda, which is a decoration for your Orbiter.
You can also trade 10 Riven Sliver to Palladino each week, in exchange for a Riven mod. You can get Riven Slivers by opening Requiem Relics.
Riven Mods are potentially mighty mods for weapons. When you first get them, they need to be unlocked by completing a specific challenge. The challenge may be to perform certain actions or kill certain enemies under different conditions. Once it is opened, it will randomly roll out for a specific weapon. All weapons have a different Riven Disposition, which denotes the likelihood of a mod for that weapon appearing.
Riven Mods can provide several buffs, and potentially a negative, for the weapons they can be used on. They can impact stats like damage, critical chance, critical damage, status chance, range, or rate of fire, to name but a few. It is possible to reroll the Riven Mod and get a new set of buffs by using Kuva. This can be done at the Mods console in your Orbiter.
When you reroll a Riven, you then have the option to keep the initial set of buffs or switch to the new set of buffs, allowing you to pick between the two sets to keep the best one. The Kuva cost of rerolling a Riven Mod starts at 900 Kuva, increasing to a maximum of 3500 Kuva for the 10th reroll, then 3500 Kuva for each reroll after that.