Level 30

This is the third boss you will fight and the first stage with three waves.

Strategy
The last wave is just a boosted version of Level 29. It is the second wave that is painful. The Terracranks have high health, and there are three of them! The last boss can easily be cheesed as mentioned below.

Strategy 1 (No cheating, Breedable epics)
Monsters: Musu, Rhynex, Tarzape

Moves: Rhynex needs both Spark Beam and Poison Ivy. Musu's moves aren't as important. All that matters is that he has some damaging moves and Energetic Water.

Runes: Musu and Rhynex need 3 Strength, Tarzape needs 1 Speed and 2 Team Speed

What to do:

The first and most important thing to do is kill the Obsidia. He can blind your team and do lots of damage. Once he is taken out, you can prepare your army, since the Electrex and Light Sphinx deal very little damage. Make sure that Musu does Energetic Water on both himself and Rhynex. Wait for the blind to wear off. Once your team is ready, kill the Light Sphinx and Electrex. In the next node, make sure Rhynex poisons the whole team. Repeat the process till you have one Terracrank at low health. You then do the same setting up process you did in the previous wave. Once you are ready, kill the Terracrank and prepare for the final wave. Rhynex should use both Spark Beam and Poison Ivy on the boss, to remove 25% of his health each turn. Continue the process for four turns and the boss should be defeated. Tarzape is there for healing.

Strategy 2 (Stalling with Haze)
Monsters: Haze, Tarzape, a monster that can kill the Obsidia and Terracranks in Wave 2 (Firetaur is a good choice)

Moves: Tarzape needs Fresh Respite. Firetaur needs two burn moves (Nuclear Heat and Let them Burn!)

Runes: Haze needs 3 Strength with some speed Runes if necessary, Tarzape needs 2 Team Speed and 1 Speed, Firetaur needs 3 Strength

What to do:

￼Let Firetaur use Nuclear Heat on the Obsidia. Then Let your whole team deal damage to that Obsidia until he is at 700 health. It is recommended to use Nuclear Heat when the Obsidia is already at 700 health. Now do literally nothing from here until Haze can do his special attack. Tarzape is there to heal your team just in case the enemy team did too much damage. Once Haze's special is active, do not use it. Save it for the last wave. Now kill the enemy team and prepare for the next wave. Firetaur and Haze should deal with the Terracranks. If Haze's health is lower, it is better. Just make sure it isn't too low. After you are done with that wave, you will be fighting the boss now. Let Haze do his special attack. Basically what his special attack does is it switches the amount of life between himself and the target, so the amount of health Haze currently has, the boss will have that much health, and Haze will pretty much heal by 100%. Now finish off the boss since his health is majorly reduced.

Strategy 3 (Stalling with Hellberus)
Monsters: Hellberus, Tarzape, a third monster to kill the Terracranks in Wave 2

Moves: Hellberus needs Expiation Tears

Runes: 3 Strength on Hellberus, the same runes for Tarzape in Strategy 1 and 2, the third monster needs 3 Strength.

What to do:

Let Hellberus spam Expiation Tears on the Obsidia until the Obsidia is at 700 health. The Obsidia will die within the next 4 turns. Now do nothing until Hellberus gets his special. Once he does, do not use it! Now now the Electrex and Light Sphinx and get ready for the next wave. Let Hellberus and the third monster you have kill the Terracranks. Now you should be in the final wave. When you are, let Hellberus use his special. This makes it so that the boss will die after 3 turns. Now just do nothing and heal your team every once in a while with Tarzape. You can do this exact strategy with Fliploch, a breedable epic, but his health isn't very high and you will need to kill the Obsidia with raw damage.