If you are in a combat and use Rengar to react and start a fight at another battlefield, do you complete the first one before going to the second, and can you play spells on the second while in the first?

Question

Accepted Answer

Yes, you must complete the first combat entirely before the second combat can begin.

According to **RiftJudge FAQ #5896**, you cannot have two simultaneous combats; the active showdown continues until its combat damage step completes. Only after the first showdown ends can the new combat at the second battlefield begin.

Here is the breakdown of how the sequence works:

### 1. The Sequence of Events
*   **Active Combat:** You are currently in a combat showdown at "Battlefield A." This combat is the active, ongoing event.
*   **Playing Rengar:** Because **Rengar, Pouncing** has the **[Reaction]** keyword, you can play him at reaction speed during the "Closed State" of that active combat (Rule 739.3.a, FAQ #8779).
*   **Staging the Second Combat:** When you play Rengar to "Battlefield B" (a battlefield you are attacking), you move him there. This creates a "Staged" combat (Rule 456).
*   **Completing the First Combat:** The game forces the current active combat at "Battlefield A" to proceed through all its steps (including the combat damage step and combat cleanup) to completion.
*   **Initiating the Second Combat:** Only after the first combat ends does the second combat at "Battlefield B" officially initiate.

### 2. Playing Spells
Regarding your question about playing spells on the second battlefield while still in the first:

*   **While the First Combat is Active:** You are in a closed state. You can continue to play **[Reaction]** cards or use triggered abilities (like Rengar's) that are legal to play in that state. You cannot play **[Action]** spells, as those require an "Open State" (when the chain is empty).
*   **During the Transition:** Once the first combat finishes (cleanup step), there is a brief window where the game returns to an "Open State" before the second combat initiates. In this window, you have the opportunity to play **[Action]** spells.
*   **Once the Second Combat Initiates:** Once the second combat begins, you are in a new "Closed State" (or a new showdown window). You are restricted to playing **[Reaction]** cards again until that chain clears and the state opens.

***

**Important Note:** Because the first combat must complete entirely before the second begins, any "this combat" effects or damage marked on units from the first battle will be cleared during the first combat's cleanup step (as per the Showdown Flow in your instructions). Those effects will not persist into the second combat.