Relentless Pursuit (Blue)

Mark target opposing hero.

If you've attacked them this turn, put this on the bottom of its owner's deck.

Go again

Rulings

From the The Hunted release notes

You can target a hero that is already marked. When Relentless Pursuit resolves, you will mark that hero (if they aren’t already marked).

Keyword notes

Mark - (You are marked until a hero hits you.)

Marked is a new state for a hero.
In The Hunted, there are effects that mark a hero. Some cards and their effects may depend on whether a hero is marked or not.
A hero is marked until they are hit. Once they are hit, the marked status is immediately removed and they are no longer marked. This is not a triggered effect or a game-state process.
Marking a marked hero does nothing.
If a marked hero becomes a different hero or reverts to their base hero (e.g. Arakni, Marionette; Shiyana), their marked condition persists after they become / revert their specified hero.
If a marked hero transforms into a different hero (e.g. Teklovossen, the Mechropotent; Levia, Redeemed), that hero is not marked.

All keywords

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)