Gravios

From Monster Hunter - Wiki on Neoseeker

One of the largest wyverns in the world of Monster Hunter, the Gravios is the adult form of Basarios. The creature's large body is covered in a thick stone-like carapace, the carapace itself is covered with small holes that are used to vent the excessive heat within its body as well as a sleeping gas formed in a sac in the creature's body. Gravios is able to shoot a beam of magma from its mouth, which it fires either in a straight line, or in higher rank missions, in an arc. It may be interesting to note that the Gravios derives it name from the Latin word gravis, meaning heavy or grave.

Gravios is one of the creatures whose roar is much louder than others, requiring hi-grade earplugs to nullify it, blocking is effective as well but rolling to avoid it will only end in the hunter covering their ears once they ended the roll.

Gravios has a sub-species that has a black armored carapace that is much tougher to break through and favors using its heat-based attacks more often.