How does lethal damage assignment work with deathtouch effects like Imperial Decree - does 1 damage count as lethal, or must you still assign damage equal to the unit's full might?

Ruling: You must still assign damage equal to a unit's full might value, even when effects like Imperial Decree (deathtouch) are active. Lethal damage is defined as damage equal to the unit's might, regardless of damage-dealing keywords.

Nuances:

• This makes deathtouch effects work best when moving units in one-by-one to attack, rather than all at once
• The effect is designed to work with tokens despite requiring full might assignment
• If a unit already has marked damage, lethal damage calculation includes that marked damage (you only need to assign enough additional damage to reach the might total)