Tiamat

Tiamat is a Summon sequence of the Mars element. When three Djinn of the Mars Element are on standby, the Tiamat Summon sequence can be activated. It resembles a large purple dragon with tiny wings which drops in, waits a moment, and then breathe fire onto the enemy party.

Tiamat has a base Mars power of 120 and also does additional damage equivalent to 9% of the enemy’s maximum HP. Tiamat is the first truly useful Mars summon sequence. It is twice as powerful as Kirin and uses only 1.5 times the amount of Djinn on standby. It can be very effective against the boss fight against the Hydros Statue in Altin Peak.

Cultural Allusions
Tiamat was a monster/goddess in Babylonian and Sumerian mythology. She's often portrayed in the form of a sea serpent or dragon, although this is only done in modern times and no ancient text supports this.