Does Elder Dragons lethal damage ability effect Vilemal if a unit has less might than him?
No, Elder Dragon's ability does not override Vilemaw's ability to prevent combat damage.
The Reasoning
- Vilemaw's Ability: Vilemaw has a passive ability that states: "Enemy units here with less Might than me don't deal combat damage." This acts as a restriction on dealing damage during the combat damage step.
- Elder Dragon's Ability: Elder Dragon’s ability states: "Any amount of your damage is enough to kill enemy units." This modifies the definition of lethal damage (the amount of damage required to kill a unit) for damage you are responsible for.
Why they don't conflict:
These two abilities address completely different aspects of combat:
- Vilemaw prevents the attempt to deal damage entirely if the Might requirement is not met. If a unit has less Might than Vilemaw, it never successfully deals its combat damage.
- Elder Dragon changes the lethal threshold for damage that is actually dealt (i.e., damage that is not prevented).
If an attacking unit has less Might than Vilemaw, Vilemaw's ability prevents it from dealing any combat damage at all. Because no damage is dealt, there is no damage for Elder Dragon's ability to modify. Consequently, the unit will not deal damage to you, and the Elder Dragon's lethal-damage modification does not apply because no damage ever reaches Vilemaw.