status/CurseDrainHealthStatus.cs
using System;
using System.Collections.Generic;
using System.Linq;
using Sandbox;

[Status(99, 0, 1f, 0, true )]
public class CurseDrainHealthStatus : Status
{
	public CurseDrainHealthStatus()
    {
		Title = "Waste Away";
		IconPath = "textures/icons/curse_drain.png";
	}

	public override void Init(Player player)
	{
		base.Init(player);
	}

	public override void Refresh()
    {
		Description = GetDescription(Level);

        Player.Modify(this, PlayerStat.HealthRegen, -GetHpDrainAmountForLevel(Level), ModifierType.Add);
    }

	public override string GetDescription(int newLevel)
	{
		return string.Format("Lose {0} HP/s", GetHpDrainPrintAmountForLevel(Level));
	}

	public override string GetUpgradeDescription(int newLevel)
	{
		return newLevel > 1 ? string.Format( "Lose {0}→{1} HP/s", GetHpDrainPrintAmountForLevel(newLevel - 1), GetHpDrainPrintAmountForLevel(newLevel)) : GetDescription(newLevel);
	}

    public float GetHpDrainAmountForLevel(int level)
    {
        return level * 1.0f;
    }

    public string GetHpDrainPrintAmountForLevel(int level)
    {
        return string.Format("{0:0}", GetHpDrainAmountForLevel(level));
    }
}