Become the Bottle (Blue)

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When this attacks, choose a card on the combat chain. This gets the chosen card's name.

Go again

Rulings

From the Compendium of Rathe release notes

Become the Bottle’s ability triggers when it resolves on the stack and becomes an attacking card. You must choose which card on the combat chain when the triggered effect resolves. Become the Bottle gets the chosen card’s name.
You may choose Become the Bottle itself as it is a card on the combat chain when the triggered effect resolves.
If you choose a card with multiple names (e.g. a defending split card, an attacking card with multiple names), Become the Bottle’s will get all the names of that chosen card.

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)