The weapon will drop as a Deepsight you can then extract or dismantle, if it does have a red boarder. If not then you can use an exotic Harmonizer to apply it as a one time use. Typically you need 3-5 patterns to complete a weapon to craft it. Crafted weapons let you choose all available traits after leveling it up. Are you missing Aspects at all? Ikora has most of them available to unlock.

[quote]How do you add deepsight to weapon and what does it do?[/quote] [b]Deepsight[/b] is a mechanic of the larger weapon Crafting system (which has been deemphasized in recent content releases). Once you have unlocked the ability to Craft weapons by completing the first Mission of the [b]Witch Queen[/b] Campaign, [b]Arrival[/b] (which is available for free to all players), you will have to unlock the [b]Patterns[/b] for individual weapons in order to Craft them at the [b]Enclave[/b], located in the [b]Throne World[/b] destination map. [b]Deepsight[/b] weapon drops (indicated by a distinct red border around the weapon icon) can be used to gain progress toward fully unlocking the [b]Pattern[/b] necessary to Craft that weapon. [b]Deepsight[/b] drops for Craftable Exotic weapons are obtained by completing their respective Exotic Missions, and can be Crafted after acquiring a single red border drop (although additional crafting options are gated through the earning of [b]Intrinsics[/b] and [b]Catalysts[/b] from these same Missions). [b]Deepsight[/b] drops for Craftable Legendary weapons on the other hand are generally earned from specific Activities where applicable (mostly Craftable Raid weapons at this point). Many Craftable Legendary weapons can no longer be easily farmed as the Activities from which they originally dropped have been removed from the game, although they may occasionally appear available for in-game purchase at certain Vendors such as [b]Xur[/b]. Not every copy of a Craftable Legendary weapon will drop with [b]Deepsight[/b] active; there is an element of RNG. A special currency known as a [b]Deepsight Harmonizer[/b] can be spent to apply [b]Deepsight[/b] to a Craftable weapon that does not drop with [b]Deepsight[/b] naturally. This currency can be purchased at the [b]Monument to Seasons Past[/b] in the [b]Tower[/b] at the price of 300 [b]Chronologs[/b] each. The [b]Deepsight Harmonizer[/b] currency can only be applied to a weapon if all of the following circumstances are true: • It is a Craftable Legendary weapon, the [b]Pattern[/b] for which you have not yet fully unlocked. • The copy of the weapon originally dropped or was purchased without [b]Deepsight[/b] active. • The copy of the weapon has not already had [b]Deepsight[/b] applied to it via a [b]Deepsight Harmonizer[/b]. Note that the vast majority of weapons cannot be Crafted. For a full list of Craftable weapons navigate to the Collections tab and select the [b]Patterns and Catalysts[/b] options on the right side of your screen. [quote]Also, how do you open additional aspects for abilities?[/quote] For the three Light Subclasses (Arc, Solar, Void) [b]Aspects[/b] are unlocked via purchase from [b]Ikora Rey[/b] in the [b]Tower[/b], and then meditating via the prompt located nearby. For the Stasis Subclasses, you will need to complete the [b]Beyond Light[/b] Campaign, followed by a series of Quests given by the [b]Exo Stranger[/b] on [b]Europa[/b]. For many Strand Subclass abilities you will need to complete the [b]Lightfall[/b] Campaign, earn [b]Strand Meditations[/b] by defeating enemies using Strand damage at [b]Neomuna[/b] on [b]Neptune[/b], and then purchase them from the [b]Pouka Pond[/b]. One additional Strand Aspect for each Subclass is obtained by completing the [b]Unfinished Business[/b] Quest. For the Prismatic Subclasses, you will first need to complete the [b]Final Shape[/b] Campaign, followed by the [b]Destined Heroes[/b] Questline with one character on your account. For your second/third characters you will again have to complete the Campaign, but the subsequent Questline will instead be split into six separate Missions that can be launched by interacting with their respective Banners located at the [b]Lost City[/b] hub in the [b]Pale Heart[/b]. (΄◉◞౪◟◉｀)