Amulet of Lightning (Blue)

Go again

Instant - Destroy this: Target action card gets go again. Activate this only if you've Lightning fused this turn.

Rulings

From the Tales of Aria release notes

You cannot defend with Amulet of Lightning as it does not have a defense value.
You can target a non-attack action card with Amulet of Lightning.
You can target a card that has not been Lightning fused, as long as you have Lightning fused this turn.

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)