Hot Streak

Once per Turn Action -

: Attack

When this is defended by 1 or more attack action cards, this card's attacks get go again this turn.

Rulings

From the Heavy Hitters release notes

This is self-referencing. If you control two Hot Streaks, and one of them triggers, the other one does not automatically get go again. I.e. both of those Hot Streaks need to trigger independently.

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)