I think laas Maas as mentioned above is quite spicy along with phaal curry, chicken kolhapuri, . Also, it depends from place to place, the spiciness of food. so if you travel to Rajasthan, almost every dish you try will be on spicier side.
There are lot of spicy dishes in India, added to real hot spices, which makes our tongue burn and savour taste too. Pork vindaloo is a Goan dish added to Kashmiri chillies
Chettinad chicken is too spicy added to pepper
Andhra chilli chicken added to chillies
Kolhapuri chicken is added to marinated chillies
Spicy aloo sabji Punjab is full of chilli powder
Mirchi ka Koota rajasthan is added to chillies with a dash of milk
Misal is a Marathi dish made out of black pepper powder
The spiciest food of India (south) is Hyderabadi Biryani(chicken/Mutton) and you'll get it in Hyderabad (only) when I mention south especially, you get to see different flavors of spiciness. The biryani preparation itself is mouth watering! 🤤