Each friendly non-leader unit that costs 6 or more gains Ambush.

Each friendly non-leader unit that costs 6 or more gains Ambush. 

Rules Clarifications:

• Abilities that refer to a card’s cost always refer to its printed cost, regardless of modifiers. 
• Ambush is an ability that triggers at the same time as “When Played” abilities. If there is no enemy unit that can be attacked, the unit does not ready.