Skaven Warscroll Battalion: Plaguesmog Congregation

0-1 Verminlord Corruptors
1 Plague Priest on Plague Furnace
2+ Plague Censer Bearers units

At the start of your hero phase, pick 1 terrain feature on the battlefield and roll a dice for each enemy unit within 3" of that terrain feature. On a 4+, that unit suffers D3 mortal wounds.