Engulfing Flamewave (Yellow)

When this hits, reveal the top card of your deck. If it's an attack action card with cost less than number of Draconic chain links you control, banish it. You may play it this turn.

Go again

Rulings

From the Uprising release notes

You must banish the card if it is an attack action card with cost less than the number of draconic chain links you control. It is not an optional effect.
If you banish a card and do not play it this turn, it remains banished.

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)