Um ladino recebe um ataque furtivo, ou vantagem de combate se no início de sua ação ele tiver cobertura ou estiver oculto.
O ladino pode atacar por trás de uma parede e obter os dados de ataque furtivos, mas como as chances são de que eles não terão cobertura a não ser que haja uma tapeçaria ou algo assim, na maioria dos casos eles realmente precisam se mover e em seguida, carregue. Essa ação de movimento remove sua cobertura.
No entanto, algumas habilidades permitem que você se mova e ataque na mesma ação, e essas ações recebem dados de ataque furtivos.
A regra geral é verificar se há cobertura no final de cada ação. (movimento, padrão ou menor) Se não houver cobertura no final de cada ação, não há cautela na próxima ação.
Fonte: Stealth
Stealth: Free action made after moving into a square at the end of an action. You may use a move action to make a Stealth check in your current square.
✦ Opposed Check: Stealth vs. passive Perception. If multiple enemies are present, your Stealth check is opposed by each enemy’s passive Perception check. If you moved more than 2 squares in the action prior to making the check, you take a –5 penalty to the Stealth check. If you ran, the penalty is –10.
✦ Becoming Hidden: You can make a Stealth check against an enemy only if you have superior cover or total concealment against the enemy or if you’re outside the enemy’s line of sight. Outside combat, the DM can allow you to make a Stealth check against a distracted enemy, even if you don’t have superior cover or total concealment and aren’t outside the enemy’s line of sight. The distracted enemy might be focused on something in a different direction, allowing you to sneak up.
✦ Success: You are hidden, which means you are silent and invisible to the enemy (see “Concealment” and “Targeting What You Can’t See,” page 281).
✦ Remaining Hidden: You remain hidden as long as you meet these requirements.
Keep Out of Sight: If you no longer have any cover or concealment against an enemy, you don’t remain hidden from that enemy. You don’t need superior cover, total concealment, or to stay outside line of sight, but you do need some degree of cover or concealment to remain hidden. You can’t use another creature as cover to remain hidden.
Keep Quiet: If you speak louder than a whisper or otherwise draw attention to yourself, you don’t remain hidden from any enemy that can hear you.
Keep Still: If you move more than 2 squares during an action, you must make a new Stealth check with a –5 penalty. If you run, the penalty is –10. If any enemy’s passive Perception check beats your check result, you don’t remain hidden from that enemy. Don’t Attack: If you attack, you don’t remain hidden.
✦ Not Remaining Hidden: If you take an action that causes you not to remain hidden, you retain the benefits of being hidden until you resolve the action. You can’t become hidden again at the end of that action.
✦ Enemy Activity: An enemy can try to find you on its turn. If an enemy makes an active Perception check and beats your Stealth check result (don’t make a new check), you don’t remain hidden from that enemy. Also, if an enemy tries to enter your space, you don’t remain hidden from that enemy.