If a unit is targeted by Darius's spell (Noxian Guillotine) before combat, does it only need 1 damage assigned to it during combat to die?

Ruling: No, you must still assign damage equal to the unit's might during combat, even if it was targeted by Noxian Guillotine earlier. The Guillotine effect does not reduce the lethal damage requirement for combat damage assignment.

Sequence:

• Noxian Guillotine resolves during showdown before combat damage
• During combat, you must still assign lethal damage (damage equal to or exceeding might) to units before assigning damage elsewhere
• After combat damage is dealt, the unit targeted by Guillotine will die from the combined damage

Nuances:

• If you have enough total damage to split between multiple units, you can assign lethal damage to one unit and less-than-lethal damage to a Guillotine-targeted unit, and both will die (e.g., 4 might attacking two 3-might units where one was Guillotined: assign 3 to one, 1 to the Guillotined unit)
• This ruling applies even to units with Tank - you must still assign damage equal to their might before damaging other units
• Lethal damage is defined as nonzero damage equal to or exceeding a unit's might