My legend is Draven. I have a 4 might unit in BF1, my enemy attacks bf1 with a 6 might unit. During combat i use Existential Dread and stun his unit. Did i Win combat?

No — the combat ends in "No Result," so you don't win and Draven's draw doesn't trigger.

Here's why: Existential Dread stuns the 6-Might attacker, so it deals 0 damage, and your 4-Might unit assigns 4 damage to it — not enough to kill a 6-Might unit. In Combat Cleanup, that damage is healed, and because the attacker is still present while defenders remain, Step 3d recalls the attacker to its owner's Base. Since a unit was recalled during Combat Cleanup, Rule 466.3.d (updated by the 2026-04-29 FAQ clarification) makes the result "No Result" — not a win for you. Glorious Executioner's "When you win a combat, draw 1" therefore does not fire.