Chill to the Bone (Blue)

The next time an Ice or Elemental attack hits a hero this turn, create a Frostbite token under their control.

Go again

Rulings

From the Tales of Aria release notes

A Frostbite token is an Elemental Aura with “Cards and activated abilities you control cost an additional . At the beginning of your end phase or when you play a card or activate an ability, destroy Frostbite.”
A weapon attack counts as long as it is an Elemental weapon attack.

Keyword notes

Go again - Go again allows multiple actions to be played in a turn when usually playing an action with use up your action point, and therefore end your turn. A card with go again gives the controller of that card or activated ability 1 action point when it resolves.

When an action with go again resolves, its controller gains 1 action point.
Multiple instances of go again on the same card or activated ability do not stack. If a card or activated ability has multiple instances of go again when it resolves its controller gains 1 action point only.
If an action with go again does not resolve, its controller does not gain 1 action point.
You cannot reveal a card with no to Belittle. The card must have a value to its power that is 3 or less. (0 is a value)