Can someone script 1 ability for me please? i don't know if it easy but the idea:

The script i want to do , change pudge passive (flesh heap) with a new one called Poison Ocean, when pudge dies he leave a poison in the ground (like viper nethertoxin ability) that deal 25 / 30 / 40 / 55 damage per second and last for 5 seconds and range of 650 Magical damage, (the effect in the ground the same one viper nethertoxin and the ability icon i will do it my self and the addon_english too) thanks :)