She keeps watch for dragonstorms and rival clans alike. For dragons, she raises an alarm. For thieves, her blade.

Yathan Roadwatcher

When this creature enters, if you cast it, mill four cards. When you do, return target creature card with mana value 3 or less from your graveyard to the battlefield.

Tarkir: Dragonstorm Promos

Tarkir: Dragonstorm

You don’t choose a target for Yathan Roadwatcher’s ability at the time it triggers. Rather, a second “reflexive” ability triggers when you mill four cards this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.