Change
Code:
new hasoxygentank[33]
to 32.
Also.. You've got your cvar spelled wrong:
Code:
register_cvar("air_damangehp","10")
To get your task to work w/ your cvar, do this:
Code:
set_task(float(get_cvar_num("air_damagetime")),"infect",0,"",0,"b") // Infect them!
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