Field skills
Corrosive bloom
The field reference. Know what you’re working with.
tier i / unmodified preview
Cast power: 17.0 Cooldown: 16.0s Radius: 195 Active field: 5.0s Activation delay: 0.8s No Survivor traits, items, permanent upgrades or weather modifiers.
build scaling
Scales with Elemental damage. Attack Speed shortens cooldowns.
automatic activation
A delayed 5-second chemical field. Slows Rotborn and disables bulwark frontal plating. +60% skill-hit damage to ordinary swarm enemies (not empowered variants).
unlock requirement
Clear wave 9 with at least 260 kills in one expedition, or recruit Chemist.
specialization costs
Tier IV required. Refit ranks 1 / 2 / 3 open after clearing waves 10 / 14 / 17 and cost 65 / 115 / 180 scrap. Choose one branch per skill. Field training can instead spend an available upgrade choice. These previews do not unlock or purchase anything.