8/25/2017 There are several ways to secretly choose an opponent, including writing that player¡¯s name on a piece of paper that¡¯s kept with Stalking Leonin.

8/25/2017 If you have multiple Stalking Leonins, you may choose a different opponent for each one. Be careful to keep track of which opponent is chosen for each Stalking Leonin.

8/25/2017 If Stalking Leonin leaves the battlefield and returns, it¡¯s considered a new object. You may choose a new opponent and you may activate its last ability again.

8/25/2017 If you didn¡¯t choose an opponent when Stalking Leonin entered the battlefield, you can¡¯t pay the cost to activate its last ability. This will usually happen because you gained control of another player¡¯s Stalking Leonin or because a creature already on the battlefield became a copy of Stalking Leonin.

8/25/2017 If a creature is attacking a planeswalker you control, it¡¯s not attacking you. Stalking Leonin¡¯s last ability can¡¯t target it.