When you get a Riven mod they are always veiled and you need to prove yourself worthy of the Riven by completing a random challenge. Some of these challenges are easy and only takes a few minutes, other may require several attemts – and still fail if you don’t know how to do it. Below are some guides for the various Riven challenges I have completed – check back later as more guides are added as I unveil more Rivens!
For more information about Riven Mods see this guide.

• Catch 4-6 fish without missing a throw…
• Complete a solo Interception mission with level 30 or higher enemies with a Hobbled Dragon Key equipped
• Complete a Defence mission with level 30 or higher enemies with the defence target taking no damage
• Complete an extermination mission with level 30 or higher enemies without being detected
• Find 12-15 Syndicate Medallions…
• Get 3 Headshot kills in a single Aim Glide
• Get 10-20 kills in a row while wall dashing or wall clinging without touching the floor
• Get the killing blow on 4 Sentients…
• Kill 5 Dargyn Pilots before they hit the ground
• Kill 11 Enemies with Headshots from at least 100m away…
• Kill 15-25 enemies with finishers
• Kill 16 Enemies that are on a Dropship while Aim Glide
• Kill 62 enemies without dying or becoming downed
• Land 7-9 consecutive headshots while in Archwing in the Plains of Eidolon…
• Sustain a 6x melee combo multiplier for 30 seconds