Does forbidding waste still work if a unit joins mid combat?

When a second unit joins a battlefield with Forbidding Waste, the penalty immediately stops applying.

According to RiftJudge FAQ #10921, the -2 Might penalty from Forbidding Waste is a continuous static effect that is constantly re-evaluated. The battlefield checks the condition "defending alone" at all times. The moment a second friendly unit enters the battlefield, the condition is no longer met, and the -2 Might penalty is removed from your unit instantly.

Key points to remember:

• Dynamic Application: Because it is a continuous effect, it does not lock in at the start of combat. It updates immediately when the game state changes.
• Timing: Whether the unit enters during an Open or Closed state (during a chain), the penalty vanishes the moment the second unit is officially present at the battlefield.
• Combat Damage Step: If you add a unit during combat, ensure you are tracking the unit's current Might accurately for the Combat Damage Step, as the game uses the Might values present at that time (Rule 460).