Doomsaying (Red)

Go again

At the beginning of your end phase, put a doom counter on this, then each hero destroys X auras they control, where X is the number of doom counters on this.

Rulings

From the Compendium of Rathe release notes

Doomsaying’s second ability triggers at the beginning of your end phase. Neither player receives priority during the end phase of a turn. When the triggered effect resolves, you will put a doom counter on it, then each hero will destroy a number of auras they control equal to the number of doom counters on Doomsaying. If a hero controls less auras than the number of doom counters currently on Doomsaying, they must destroy as many as they can.
Doomsaying is an aura and is eligible to be destroyed by its triggered effect.

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)