Blood Line (Red)

This costs

less to play for each Draconic chain link you control.

Go again

Rulings

From the The Hunted release notes

A Draconic attack becomes a chain link when it resolves as a layer on the stack and becomes attacking. This means going from the layer step of combat to the attack step of combat.
If the combat chain is open, you are still considered to control a (Draconic) chain link, even if the attack is no longer on the combat chain. Last Known Information is used to determine the type of a chain link.
Decreases to resource costs are applied after increases to resource costs. If an effect would increase the resource cost of playing Blood Line, the decreases would be applied last.

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)