>>545509938
All Alchemist alchemy units stay after their retreat. Hell Thorns2 S3 keeping the effect on retreat was part of my clear, after Mechanist goes phase 2 I used it and retreated him then placed blockers in the middle, the ursus raiders get melted by his S3 debuffing them a lot and dealing good damage while I don't have to worry about any other ranged DPS exploding there.