Zen Primus

Zen Primus is a boss who serves as the Guardian of Burning Temple. Upon defeat, he drops Zen Mortar for Nina, or Zen Ascent for Ace.

Attacks
Zen Primus primarily moves around the arena by jumping and using his wide variety of melee attacks. In the first phase, his attacks include:


 * A ground pound that causes six fireballs to rise up from the ground, three to each side of Zen Primus. The fireballs' locations are indicated by a red ! mark about a half-second before they appear.
 * A rising uppercut that stops once it hits the ceiling, creating a fan of five fireballs from the impact point.
 * A three-part combo move that launches three fireballs in a 30-degree cone straight forward on the first punch, three more fireballs

Upon reaching about 50% (?) HP, Zen Primus will go into his second phase, where he hovers to the center of the arena and retreats into a completely invulnerable shield, and four statues will become active. The player must destroy all four of these shield statues to proceed in the fight. Occasionally, fireballs will spawn from the walls, ceiling, and floor of the arena; where they will come is indicated by a row of four red ! marks about a half-second before they are fired. Also, Zen Primus will periodically lower his shield during this phase, making him vulnerable for a moment and allowing the player to attack him in this phase.

Once all four statues are destroyed, Zen Primus go into an enraged state and begin the initial phase of the fight once more. However, while enraged, Zen Primus will attack much faster than usual, and the fireballs from his shield phase will still continue to appear.

Tips
When playing as Ace, Ryuusei (dropped from Capital Punishment) can instantly destroy the statues that generate Zen Primus's shield during his second phase.

Due to the amount of fireball spam that can potentially happen, it is recommended to bring some form of defensive ability (Ace's Echo Shell, Nina's Negation Pulse, or the Armatort's Pound core).

When Zen Primus is performing his ground pound, it is recommended to get as far away as possible, due to the red ! marks that appearing still counting as an active hitbox, likely due to a bug.

If you have Grandmaster equipped as Ace, it is possible (but difficult) to fling the shield statues into Zen Primus for big damage.