diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/flake.lock b/flake.lock
index 66032f3..061263f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -5,11 +5,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1694529238,
-        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
         "type": "github"
       },
       "original": {
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1699169573,
-        "narHash": "sha256-cvUb1xZkvOp3W2SzylStrTirhVd9zCeo5utJl9nSIhw=",
+        "lastModified": 1704290814,
+        "narHash": "sha256-LWvKHp7kGxk/GEtlrGYV68qIvPHkU9iToomNFGagixU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "aeefe2054617cae501809b82b44a8e8f7be7cc4b",
+        "rev": "70bdadeb94ffc8806c0570eb5c2695ad29f0e421",
         "type": "github"
       },
       "original": {
diff --git a/lib/DND.hs b/lib/DND.hs
index 004e8eb..277a816 100644
--- a/lib/DND.hs
+++ b/lib/DND.hs
@@ -2,8 +2,10 @@ module DND
 ( module DND.Sheet.Content
 , module DND.Sheet.Parser
 , module DND.Bob
+, module DND.Dice
 ) where
 
 import DND.Sheet.Content
 import DND.Sheet.Parser
+import DND.Dice
 import DND.Bob
diff --git a/lib/DND/Bob.hs b/lib/DND/Bob.hs
index 2ee605b..f7e2f51 100644
--- a/lib/DND/Bob.hs
+++ b/lib/DND/Bob.hs
@@ -3,7 +3,7 @@ module DND.Bob (bob) where
 import DND.Sheet.Content
 
 bob :: Character
-bob = Character testPreamble testTrivia testStats (Just testSpells)
+bob = Character {skills=testSkills, trivia=testTrivia, stats=testStats, spells=Just testSpells, preamble=testPreamble, feats=Just testFeatures}
 
 testStats :: [Stat]
 testStats = [strStat,dexStat,conStat,intStat,wisStat,chaStat]
@@ -15,65 +15,72 @@ testTrivia :: Trivia
 testTrivia = Trivia "farmer" "none" "I me likey fun things" "yay" "all" "idk"
 
 strStat :: Stat
-strStat = Stat "Strength" 10 False strSkills
+strStat = Stat "Strength" 10 False
 
 strSkills :: [Skill]
-strSkills = [ Skill "Athletics" None ]
+strSkills = [ Skill "Athletics" None "Strength" ]
 
 dexStat :: Stat
-dexStat = Stat "Dexterity" 10 False dexSkills
+dexStat = Stat "Dexterity" 10 False
 
 dexSkills :: [Skill]
-dexSkills = [ Skill "Acrobatics" None
-            , Skill "Sleight of Hand" None
-            , Skill "Stealth" None
+dexSkills = [ Skill "Acrobatics" None "Dexterity"
+            , Skill "Sleight of Hand" None "Dexterity"
+            , Skill "Stealth" None "Dexterity"
             ]
 
 conStat :: Stat
-conStat = Stat "Constitution" 10 False []
+conStat = Stat "Constitution" 10 False
 
 intStat :: Stat
-intStat = Stat "Intelligence" 10 False intSkills
+intStat = Stat "Intelligence" 10 False
 
 intSkills :: [Skill]
-intSkills = [ Skill "Arcana" None
-            , Skill "History" None
-            , Skill "Investigation" None
-            , Skill "Nature" None
-            , Skill "Religion" None
+intSkills = [ Skill "Arcana" None "Intelligence"
+            , Skill "History" None "Intelligence"
+            , Skill "Investigation" None "Intelligence"
+            , Skill "Nature" None "Intelligence"
+            , Skill "Religion" None "Intelligence"
             ]
 
 wisStat :: Stat
-wisStat = Stat "Wisdom" 10 False wisSkills
+wisStat = Stat "Wisdom" 10 False
 
 wisSkills :: [Skill]
-wisSkills = [ Skill "Animal Handling" None
-            , Skill "Insight" None
-            , Skill "Medicine" None
-            , Skill "Perception" None
-            , Skill "Survival" None
+wisSkills = [ Skill "Animal Handling" None "Wisdom"
+            , Skill "Insight" None "Wisdom"
+            , Skill "Medicine" None "Wisdom"
+            , Skill "Perception" None "Wisdom"
+            , Skill "Survival" None "Wisdom"
             ]
 
 chaStat :: Stat
-chaStat = Stat "Charisma" 10 False chaSkills
+chaStat = Stat "Charisma" 10 False
 
 chaSkills :: [Skill]
-chaSkills = [ Skill "Deception" None
-            , Skill "Intimidation" None
-            , Skill "Performance" None
-            , Skill "Persuasion" None
+chaSkills = [ Skill "Deception" None "Charisma"
+            , Skill "Intimidation" None "Charisma"
+            , Skill "Performance" None "Charisma"
+            , Skill "Persuasion" None "Charisma"
             ]
 
+testSkills :: [Skill]
+testSkills = strSkills ++ dexSkills ++ intSkills ++ wisSkills ++ chaSkills
+
 testSpells :: [Spell]
-testSpells = [ Spell "Firetesticle" -- spellName
-                     3 -- spellLevel
-                     "3 Minutes" -- castingTime
-                     50 -- range
-                     [Verbal, Somatic] -- components
-                     "Instant" -- duration
-                     "Dexterity" -- attackSave
-                     "Fire" -- damge/effect
-                     "Shoots a huge testicle shaped fireball" -- description
-                     "Conjuration" -- school
-                     "Cast more of the sodding things" -- atHighLevel
+testSpells = [ Spell { spellName = "Firetesticle"
+                     , spellLevel = 3
+                     , castingTime = "3 Minutes"
+                     , range = 50
+                     , components = [Verbal, Somatic]
+                     , duration = "Instant"
+                     , attackSave = "Dexterity"
+                     , damageEffect = "Fire"
+                     , description = "Shoots a huge testicle shaped fireball"
+                     , school = "Conjuration"
+                     , atHighLevel = "Cast more of the sodding things"
+                     }
              ]
+
+testFeatures :: [Feature]
+testFeatures = [ Roleplay FeatInfo { featName = "fiets", featDescription = "allows you to ride a 'fiets'" } ]
diff --git a/lib/DND/Dice.hs b/lib/DND/Dice.hs
new file mode 100644
index 0000000..5c244f2
--- /dev/null
+++ b/lib/DND/Dice.hs
@@ -0,0 +1,16 @@
+module DND.Dice
+( rolls
+, d20
+, advantage
+) where
+
+import System.Random
+
+rolls :: RandomGen a => Int -> Int -> a -> [Int]
+rolls x y = take x . randomRs (1, y)
+
+d20 :: RandomGen a => a -> Int
+d20 = minimum . rolls 1 20
+
+advantage :: RandomGen a => a -> Int
+advantage = maximum . rolls 2 20
diff --git a/lib/DND/Sheet/Content.hs b/lib/DND/Sheet/Content.hs
index 73e52db..a360459 100644
--- a/lib/DND/Sheet/Content.hs
+++ b/lib/DND/Sheet/Content.hs
@@ -10,6 +10,8 @@ module DND.Sheet.Content
 , Spell(..)
 , SpellComponent(..)
 , Feature(..)
+, FeatInfo(..)
+, fiets
 ) where
 
 import Data.Aeson ( FromJSON, ToJSON )
@@ -36,6 +38,12 @@ instance ToJSON ScoreMod
 instance FromJSON Spell
 instance ToJSON Spell
 
+instance FromJSON Feature
+instance ToJSON Feature
+
+instance FromJSON FeatInfo
+instance ToJSON FeatInfo
+
 instance FromJSON SpellComponent
 instance ToJSON SpellComponent
 
@@ -48,8 +56,9 @@ data Character = Character
                { preamble :: Preamble
                , trivia :: Trivia
                , stats :: [Stat]
+               , skills :: [Skill]
                , spells :: Maybe [Spell]
-               --, feats :: [Feat]
+               , feats :: Maybe [Feature]
                } deriving ( Show, Eq, Ord, Generic)
 
 data Preamble = Preamble
@@ -72,13 +81,18 @@ data Trivia = Trivia
 data Skill = Skill
            { skillName :: String
            , skillMod :: ScoreMod
+           , relatedStat :: String
            } deriving ( Show, Eq, Ord, Generic)
 
+fiets = Skill { skillName = "Stuff"
+              , skillMod = None
+              , relatedStat = "Strength"
+              }
+
 data Stat = Stat
-          { stat :: String
+          { statName :: String
           , score :: Int
           , proficient :: Bool
-          , skills :: [Skill]
           } deriving ( Show, Eq, Ord, Generic)
 
 data Spell = Spell
@@ -100,21 +114,25 @@ data SpellComponent = Verbal
                     | Material
                     deriving ( Show, Eq, Ord, Generic)
 
+data FeatInfo = FeatInfo { featName :: String
+                         , featDescription :: String
+                         } deriving ( Show, Eq, Ord, Generic)
+
 data Feature = StatIncrease
-                { increase :: [Stat] }
+                { featInfo :: FeatInfo
+                , increase :: [Stat] }
              | SetProficiency 
-                { changeModState :: [ScoreMod]
-                , featDescription :: String
+                { featInfo :: FeatInfo
+                , changeModState :: [ScoreMod]
                 }
              | SetExpertise
-                { changeModState :: [ScoreMod]
-                , featDescription :: String
+                { featInfo :: FeatInfo
+                , changeModState :: [ScoreMod]
                 }
              | AddSpell
-                { addSpell :: [Spell]
-                , featDescription :: String
+                { featInfo :: FeatInfo
+                , addSpell :: [Spell]
                 }
              | Roleplay
-                { featDescription :: String
-                }
+                { featInfo :: FeatInfo }
              deriving ( Show, Eq, Ord, Generic)
diff --git a/lib/DND/Sheet/Parser.hs b/lib/DND/Sheet/Parser.hs
index 1be1bbb..aeef6c1 100644
--- a/lib/DND/Sheet/Parser.hs
+++ b/lib/DND/Sheet/Parser.hs
@@ -4,6 +4,7 @@ module DND.Sheet.Parser
 , listSkills
 , createExample
 , getName
+, getStat
 , listSkillNames
 ) where
 
@@ -34,3 +35,6 @@ createExample = flip encodeFile bob
 
 getName :: Character -> String
 getName = charName . preamble
+
+getStat :: Character -> String -> Stat
+getStat char s = head . filter (\a -> statName a == s) . stats $ char
diff --git a/sheet-parser-hs.cabal b/sheet-parser-hs.cabal
index 8d363e0..b03ea5f 100644
--- a/sheet-parser-hs.cabal
+++ b/sheet-parser-hs.cabal
@@ -58,6 +58,7 @@ library
 
     exposed-modules:  DND
                     , DND.Bob
+                    , DND.Dice
                     , DND.Sheet
                     , DND.Sheet.Content
                     , DND.Sheet.Parser
@@ -66,6 +67,7 @@ library
                     , aeson
                     , bytestring
                     , utf8-string
+                    , random
 
     hs-source-dirs:   lib