Dragon
From Tomb Raider Wiki
The Dragon that Marco Bartoli transforms into.
The Dragon is the big boss enemy of Tomb Raider II. A long, lithe creature somewhat resmbling a crocodile, it is coloured gold and orange. Its large paws can swipe at Lara, killing her instantly, while (as in the screenshot) it will also rear up to spew flames at her.
Although the dragon may seem complicated to get rid of, the only really complicated process is removing the dagger from its belly, as just the right spot has to be found. Added to this the dragon's tendancy to collapse in the middle of the pillars, it can take several tries before Lara takes out the dagger and makes her escape.