How to create a poisonous environment/biome?

[Badkraft]

Are there any examples of biomes that are deadly to players? Ocean might provide clues as how to make such an environment. But any others besides Ocean biomes?

[Nathan.S]

Deadly in what way?
Poisonous gases could be created and placed as decorations, or possibly ores, never actually tried placing an ore in air.
Lava always makes thing dangerous.
If you're using mobs you could have them spawn in your particular biome.

There is a mod, radiant damage I think, that let's you define nodes that will damage players that get within a certain radius of the node.

[Badkraft]

Deadly in what way?
Poisonous gases could be created and placed as decorations, or possibly ores, never actually tried placing an ore in air.
Lava always makes thing dangerous.
If you're using mobs you could have them spawn in your particular biome.

There is a mod, radiant damage I think, that let's you define nodes that will damage players that get within a certain radius of the node.

Radiant damage sounds promising. I've several node types that generate in corrupted biomes (3 tiers of corrupted biomes stacked one on top of another). Each node, depending on tier, irradiates the player with differing impact.