ghast descendants in the overworld

My idea is to add a white squid-like mob that only spawns in lava pools of the overworld. if the top layer of lava is covered they will despawn. for abilities, I feel it should be able to lower the player's hunger down by 2.5 with every attack or giving them mining fatigue for one minute, as for damage I feel they should do the same amount of damage a husk can do. For drops, I feel they should drop ghast tears or a fire charge if the player gets lucky. These items would have fire resistance for 30 seconds and act as they would in water (as in rising to the surface) after thirty seconds is up the items will sink and then burn. 

let me know what you think of this idea please and thank you