Nether cow

Have you imagined when you are walking through the nether that you find an orange and red cow. In your path. You try to kill it but it attacks you with great strength and agility. You kill it but the other orange cows attack you. YOU DIE! Later on you can not find a cow and you need milk so you go back to the nether and right click on one of these creatures. To your shock you are given not milk but lava. Tameable with grass from the overworld, these beasts are only spawned in the nether. They drop a blaze rod upon death. Babies are no exception and will do all of the above. When tamed this mob will fight for you. It will stay put when right clicked on.

Created in my own mod, (cow skin, entity wolf, blaze and cow sounds and adjusted settings to make it give you lava, drop blaze rod and be tamed by grass. Also turned down its health and attack), i would love to see this in vanilla minecraft one day. ,(I will add a photo of this mob from my mod). Any improvements, please comment below.