With Draven as Legend, if I attack a battlefield and my opponent removes their defending units (via Retreat/Flash/Gust/Portal Rescue/etc.), does it count as winning combat and trigger Draven's draw ability?

Ruling: Yes, if combat is started, it will resolve even without opposing units. If you have units at the end of combat, you win and trigger Draven's draw ability.

Sequence:

• Combat is initiated
• Opponent removes their units during combat
• Combat still resolves
• If you have units remaining at the end, you win the combat
• Draven's ability triggers