Ambush is a Hunter ability.
(Active) Hero draws back, ready to loose an attack upon any enemy who enters the threatened strip of tiles. If the shot is not sprung, the hero releases the attack at the beginning of their next turn.
The hero may set an ambush that covers a 3x3 grid on the battle map. If no attack occurs the hero gets a free attack at the start of the following turn. This free attack must be used first before any other actions or abilities, even Swap Weapon, or the opportunity will be lost. The free attack does not need to be targeted within the ambush area.