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The K9 Praetor is no ordinary Chaos Unit. Forged with great care and overseen by the Dark Lord itself, the Praetor is capable of combat and destruction at an unparalled level. The Praetor attacks and reacts in phases, with each phase unlocking new abilities and disabling others. The phases are detailed below, and the addtional details are given in the monster stat block. At the start of each new phase, the Praetor loses any abilities gained by the previous phase. Phase One (350–246 HP) - Defensive Supremacy The Praetor believes the party's greatest threat is its magic. Its armor locks into a reflective configuration, turning spells back against their casters while it studies the party's attack patterns. Reflective Karnkenath Carapace -- The Praetor has advantage on saving throws against spells and other magical effects. When a ranged spell attack misses the Praetor, it can use its reaction to reflect the spell's energy at the caster. The original caster makes a spell attack roll against itself using the original attack modifier. On a hit, it takes the spell's normal damage and any affects caused by the spell. This reflection works only against ranged spell attacks, not area effects or spells that require saving throws. Phase weakness — Overloaded Reflection: When the Praetor reflects a spell, its carapace briefly destabilizes. Until the start of its next turn, it cannot reflect another spell attack. Phase Two (245–141 HP) - Relentless Attacks At 245 HP or fewer, the Praetor's reflective plates retract and its joints open. Its armor becomes less focused on deflection and more focused on mobility, weapon deployment, and lethal precision. Predator Unbound -- When this phase begins, the Praetor can move up to half its speed without provoking opportunity attacks. It then ends one condition affecting it, provided that condition isn't incapacitated. Predatory Acceleration -- The Praetor's speed increases to 70 feet. It can take the Dash or Disengage action as a bonus action. Multiweapon Execution -- The Praetor's Multiattack increases to four attacks. Once per turn, when it hits the same target with two or more weapon attacks, it deals an additional 10 (3d6) necrotic damage. Phase weakness — Exposed Joints: Its armor is no longer configured to reflect magic. The Praetor loses Reflective Karnkenath Carapace for the remainder of the fight, and its AC decreases from 23 to 21. Its exposed joints make it vulnerable to radiant attacks that suppress its regeneration. Phase Three (<140 HP) - Chaotic Cataclysm The Praetor's core begins to pulse violently. It abandons preservation and activates the final combat protocols reserved for enemies capable of threatening the Shadowed Fang's designs. Unrestrained Destruction -- The Praetor's weapon attacks deal an additional 4 (1d8) force damage. It has advantage on Strength and Dexterity saving throws, and it can make three legendary actions per round instead of two. Phase weakness — Failing Core: The Praetor's reactor can no longer fully stabilize its body. Its AC decreases by another 2, to 19, and it cannot perform it's Shadowed Fang's Resilience feature as normal. The party now has a real opportunity to finish the fight if it can withstand the Praetor's increased aggression. Chaotic Cataclysm: When the Praetor reaches it's final phase, it begins a countdown until it detonates it's core. Enemies of the Praetor have 8 rounds to reduce the Praetor to 0 HP, or set off it's core. Once the Praetor has reached it's final phase, it cannot exit the countdown. The explosion can be delayed if 20+ points of radiant damage are performed on a single attack, or if a creature succeeds on a DC 25 check of the DM's discression. If the core completes it's meltdown, it causes an explosion of infernal energy beyond cataclysmic. It is up to the DM to determine what these consequeces are, but they should be, in short, campaign altering.