Does Imperial Decree affect units that enter play after it resolves, or only units that were in play when it was cast?

Ruling: Imperial Decree affects all units for the entire turn, including units that enter play after it resolves. Unlike some snapshot effects, Decree continues to apply to new units played later in the turn.

Nuances:

• This is different from effects like Watcher, which only affect units present when cast
• The effect is similar to Confront, which lingers for the rest of the turn
• The card text "When any unit takes damage this turn, kill it" applies to any unit, not just those present at resolution