i'v been doing some stuff for finding typos in the main game files , and was curious to see how well it would perform on a mod.
Here is a bunch of things that I think are errors (with the slight disclaimer that I am not an expert on Erranorth modding by any means :))

Dual Strike doesn't exist
File = Actions.Magus.tdb
Line = 37
Card = Water Wreathe Strike
Token = 'ChooseOneDual Strike#Aqua Siphon#Shearing Edge#Natural Frenzy:1'
Error = 'Dual Strike'

Fire Pyro Vortex doesn't exist
File = Actions.Magus.tdb
Line = 39
Card = Air Wreathe Strike
Token = 'ChooseOneFire Pyro Vortex#Shearing Edge#Quantum Strike#Gale Strike:1'
Error = 'Fire Pyro Vortex'

Should be OnEnemyStatusBurning:1
File = Actions.Magus.tdb
Line = 55
Card = Cauterizing Strike
Token = 'OnEnemyStatusBurn:1'
Error = 'Invalid Status Burn'

Pyro Vortex Field doesn't exist
File = Actions.Magus.tdb
Line = 123
Card = Pyro Vortex
Token = 'SpellcraftPyro Vortex Field:1'
Error = 'Unknown card name'

Missing comma after Element:Water
File = Actions.Magus.tdb
Line = 143
Card = Aquatic Form
Token = 'Element:Water Flavor:I'm River and Ocean!'
Error = 'Invalid Element'

Missing comma after Element:All
File = Actions.Magus.tdb
Line = 147
Card = Primordial Form
Token = 'Element:All Flavor:I see the pattern at last!'
Error = 'Invalid Element'

Missing comma after Element:All
File = Actions.Magus.tdb
Line = 149
Card = Primordial Form Ripple
Token = 'Element:All Flavor:Your seams are showing. '
Error = 'Invalid Element'

Missing comma after Element:Fire
File = Actions.Magus.tdb
Line = 151
Card = Fire Ripple
Token = 'Element:Fire Flavor:Fire!'
Error = 'Invalid Element'

Missing comma after Element:Water
File = Actions.Magus.tdb
Line = 153
Card = Water Ripple
Token = 'Element:Water Flavor:Water!'
Error = 'Invalid Element'

Missing comma after Element:Air
File = Actions.Magus.tdb
Line = 155
Card = Air Ripple
Token = 'Element:Air Flavor:Air!'
Error = 'Invalid Element'

Missing comma after Element:Earth
File = Actions.Magus.tdb
Line = 157
Card = Earth Ripple
Token = 'Element:Earth Flavor:Earth!'
Error = 'Invalid Element'

Missing comma after Element:Earth
File = Actions.Magus.tdb
Line = 159
Card = Stone Resonance
Token = 'Element:Earth Flavor:I won't come undone!'
Error = 'Invalid Element'

Missing comma after Element:All
File = Actions.Magus.tdb
Line = 163
Card = Twist of Fate
Token = 'Element:All Flavor:Thread the needle.'
Error = 'Invalid Element'

Missing comma after Element:All
File = Actions.Magus.tdb
Line = 169
Card = Wreathe Self
Token = 'Element:All Flavor:I am the elements incarnate!'
Error = 'Invalid Element'

Should be Actions rather than Action (though since you are setting it to 0 , it probably doesn't matter)
File = Actions.Magus.tdb
Line = 185
Card = Water Field
Token = 'Action:0'

Should be ModifyEffectBurn:1
File = Perks.Magus.tdb
Line = 43
Perk = Exotic Viper
Token = 'ModifyBurn:1'

Should be ModifyEffectBurn:1
File = Perks.Magus.tdb
Line = 46
Perk = Ascended Viper
Token = 'ModifyBurn:1'

Should be ModifyEffectVulnerable:2
File = Perks.Magus.tdb
Line = 46
Perk = Ascended Viper
Token = 'ModifyVulnerable:2'

Should be ModifyEffectStun:1
File = Perks.Magus.tdb
Line = 46
Perk = Ascended Viper
Token = 'ModifyStun:1 '

Should be ModifyEffectBurn:1
File = Perks.Magus.tdb
Line = 57
Perk = Ascended Celestial
Token = 'ModifyBurn:1'

Should be ModifyEffectVulnerable:1
File = Perks.Magus.tdb
Line = 57
Perk = Ascended Celestial
Token = 'ModifyVulnerable:1'

Also I think you don't want Unique:Form on your upgraded forms , since it means that if you pick up 'Viper Form' then it blocks you from picking up 'Exotic Viper', etc.

Good catch, i fixed all the typo you reported (you should not do code while low on sleep)
For the Unique:Form that was actually a slip-up, when i checked only the "Exotic Viper" perk had the unique tag where it should not have it.
Patch released with some small other change i had kept uploading so people could enjoy playing without the fear of the mod constantly updating and breaking things

Riptide creates a Water Field card at the end of each turn. Fleeting will then remove the Water Field before you ever get a chance to play it. I think you want to either remove Fleeting from the card Water Field, or have Riptide automatic play Water Field.