Spellblade

Your imbued auto-attacks have a 4% chance per rank (up to 12%) to discharge the imbue. Fire-Imbued: Ember Surge — your next Fireball is instant and free. Frost-Imbued: Rime Surge — your next Frostbolt is instant and free. Casting either relights that blade.

Every melee strike re-tempers the runes along your blades, extending your active Imbued Blades by half a second — steady swinging makes your imbues fade slower, but they still fade.

Casting Fireball or Frostbolt quickens your blade — +15% attack and cast speed for a few seconds. Keep casting to keep swinging faster.

While Frost-Imbued, your melee hits gain a 20% chance per rank (up to 40%) to Frostbite the target, slowing it by 30%.

While Frost-Imbued, being struck has a 30% chance per rank (up to 60%) to flash your runes into a Runic Ward, reducing damage taken.

Fire Blast leaves a smoldering burn that stacks.

Lightning Jolt becomes a melee AoE arcane slash that interrupts enemy casts.

Ice Barrier becomes Frozen Armor: +20 armor and a retaliatory chill on attackers.

CAPSTONE — spin in place for 3 seconds, lashing all adjacent foes with fire and frost slashes. Tempest strikes discharge both elements (once per second): you gain Ember Surge AND Rime Surge, and both Imbued Blades are refreshed.