Ranger Eyes (The spell)

The ranger calls upon her arcane powers to summon a band a birds to watch over the sky. Those birds (satyr shadowdance missile) fly arround the ranger, granting her an increased sight range of 3500 (with true sight and no eye disturbances). When a enemy unit goes out of the birds band it is followed by a bird for about 150 seconds. Also the ranger can cast this power upon a small (450 AoE) to view any area of the map. If there is a enemy unit on it, it will be followed by a bird for 30 seconds. Has a 15 seconds cd.

Can some spellmaker help me do that for my ranger ultimate?