Can you use a spell like Incinerate to kill a unit after combat damage is assigned but before it heals, and does a unit killed by a spell during showdown still deal its combat damage?

Question

Accepted Answer

Ruling: Once you reach the point of assigning combat damage, the showdown is closed and you cannot cast spells. However, you can cast spells like Incinerate during the showdown (before damage assignment) to mark damage on units. If a unit dies to a spell during the showdown, it is not present during the combat damage step to deal its might.

Sequence:
- Showdown opens and spells can be cast
- Combat damage assignment occurs (showdown is now closed)
- Damage is dealt simultaneously
- Units with damage marked >= their might die

Nuances:
- Do not think of units as having HP; units have might, get damage marked on them, and die when non-zero damage >= might
- A unit that takes damage from a spell like Incinerate still deals its full might value in combat (spells mark damage but don't reduce might unless specifically stated)
- When assigning combat damage, you must assign lethal damage to a unit before moving on to assign damage to the next unit
- All combat damage is dealt simultaneously