I move a 2 might unit into a BF controlled by the opponent and ambush with a Vilemaw. They have 13 might split across 4 units. If none of them are higher than Vilemaw, do I win combat or bounce since I don't have the might to kill all?

To determine the outcome, we must evaluate the combat based on the rules for Combat Damage and Vilemaw's specific ability.

1. Analysis of the Battlefield State

• Your Might: You have your 2-might unit and Vilemaw (8 might). Your total potential Might is 10.
• Opponent's Might: The opponent has 13 total Might across 4 units.
• Vilemaw's Ability: Vilemaw reads: "Enemy units here with less Might than me don't deal combat damage."
  • Since Vilemaw has 8 Might, any of the opponent's 4 units that have 7 or less Might will deal 0 combat damage to you.
  • If any of the opponent's units have 8 or more Might, those specific units will deal their combat damage normally.

2. The Combat Outcome

Regardless of whether the opponent's units deal damage or not, the "winner" of the combat is determined by which units remain at the battlefield after the Combat Damage Step.

• Combat Damage Step: You must assign your 10 total Might as damage to the opponent's units. You are required to assign lethal damage to units one by one.
  • If you can destroy all of the opponent's units (totaling 13 might), you win the combat and conquer the battlefield.
  • If the opponent still has any units remaining after your damage is assigned and dealt, you have not won the combat.
• Winning vs. Bouncing:
  • If only the opponent has units remaining, you lose the combat and your units are recalled to your base during the Combat Cleanup.
  • If both you and the opponent have units remaining, it is a "No Result," and your units are recalled to your base during the Combat Cleanup.
  • You only "win" the combat (and conquer the battlefield) if you are the only player with units remaining at that location.

Summary

Because you have 10 total Might and your opponent has 13 total Might, you cannot destroy all of their units.

• If the opponent's units survive: You will not win the combat. Even if Vilemaw prevents some or all of their damage, your attacking units will be recalled to your base during the Combat Cleanup phase because you did not clear the battlefield of opposing units.
• Targeting: You do not need the might to kill every unit to "survive," but to "win" the combat and conquer the battlefield, you must eliminate all opposing units. If any enemy units remain, you do not win, and your units will be recalled.

This interpretation is based on Rule 460 (Combat Damage) and the Showdown Flow. No official FAQ exists for this exact scenario, but the mechanics of lethal damage assignment and recall are standard.