Current Funnel (Blue)

When this attacks, if the last action card you played this turn was Lightning, this and the next action card you play this turn get go again.

Rulings

From the Rosetta + 1st Strike release notes

Current Funnel triggers when it resolves on the stack and becomes an attacking card. Whether your last action card you played this turn was a Lightning card is checked on the resolution of the trigger (during the attack step).
Current Funnel does not consider itself when checking the last action card you played. The card that is checked is the last action card that you played, excluding this Current Funnel.
Cards without the action type (e.g. instants, attack reactions etc.) are not considered. Split cards are only considered action cards if they are played with the action type (e.g. playing Burn Up||Shock melded, or just as Burn Up).

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)