Stalker's Brood
Dark Ascension releases 6 bats every 1.5s and also every time when Night Stalker casts spells.
Bats apply 100 + 100% of Night Stalker Strength as magical dmg and heal for 2.5% of enemy max HP (max 150).
Bats collision provide also buff increasing Night Stalker attack damage by 1 (Captains Creeps: x5, Boss: x10) for 12s