Black Tyrano's defense will remain high until it enters its countdown phase, which will either happen after a specific length of time has passed, or can be forced early by defeating Azala. Meanwhile, Black Tyrano in this phase will attack rarely with a single-target elemental attack. The element of Black Tyrano's attacks are random, but seeing this attack will tell you what the element of the big attack will be.

Azala is vulnerable to status ailments and magical damage. She will attack the party with physical damage and will cast “Azala Break” upon defeat, which inflicts HP Down.

Black Tyrano will count down, roaring at the party each time, inflicting HP Down (this happens often in this fight; healing it constantly will take up too much time so it's recommended to equip status protection or ignore it). When it reaches 0, it will unleash a powerful elemental tech. Ideally, defeat Black Tyrano before it uses this attack, the damage is high. If this isn't possible, you can use Magic Wall or Barriers, elemental Vests or Mails (if you know what element is coming), Earrings to raise your characters' maximum HP (with your only damage coming from the HP Down status, it's easy to keep your health topped off), or even GreenDreams.

After it uses its ultimate attack, it will spend a few turns doing other attacks, then begin its countdown again.

Black Tyrano's HP is always random, even if you're not playing with Boss Randomization (ro).