You could use death counters...
If a player wins a round they add one death counter.
Than say p1 and p2 fight.. p2 Wins. (Add 1 death)
Than do the same for the fight between player 3 and p4. Winner adds 1 Death.
| Trigger |
| Players: |
| ¤ player 2 |
| Conditions: |
¤ Current player has suffered one deaths of (unit)
|
| ¤ Other conditions |
| Actions: |
¤ Set death to 0 (unit)
|
| ¤ (actions that begin the round against winner of p3,p4) |