Part of Destiny: Nimble
Level 3
Attuned - Cold.
Gain the Stasis Spell School, or the Dark Spell School if you knew Stasis already.
Curse of Frostbite.
Whenever you apply an Affliction to a target, they become Chilled. If applying an Affliction to a Slowed target, they become Petrified for 1 round instead. You treat Slowed as an Affliction by your class features.
Level 7
Nightmare on Ice.
Advantage to Hex Hampered targets. When you damage a Petrified creature and remove that condition, it deals LVL damage within reach 2.
Level 11
Target Cracker.
Slowed and Petrified targets suffer 1 damage at the end of their movement for each space they would've moved if unaffected. Brittle Affliction deals +KEY damage per space moved while slowed
Level 15
Permafrost.
When you Petrify a creature, if it had less max HP than you, it remains Petrified permanently (acts as a barrier equal to its size dimensions)