Petrirex — the Jinto Knockout Scaler Through Three Balance Patches

What do the official patch notes say about Petrirex?

Petrirex has the longest official balance trail of any monster on this site — named in all three post-launch patches, each move on the record:

Read as one arc, the developer agrees with itself in stages: the 1.1.0 numbers were too big, the 1.2.0 fix overshot — its own words say so — and 1.3.0 hands back exactly the piece it took last. What never came back is the Damage half of the payout: a Petrirex today scales Shield per knockout on a 5.5-second cast, where the launch version scaled both on the same cast.

What does the community say about Petrirex?

The one concentrated argument on record is the Knockout teams are nerfed way too hard thread right after 1.2.0, where both camps are loud and labeled:

• “Useless now”: the original poster opens with “Rattleghast doesn’t scale, Petrirex is completely useless now”, and one reply computes the cost — “With his increased cooldown, you’re now lucky if he can knocksout the mons in your team twice”, adding that cheaper options “essentially d[o] the same thing without requiring 4-5 spots on a team to work.”
• “A scaler over time”: the counter-argument — “Petrirex is now a scaler over time, which synergizes greatly with Curio type teams… In fact Petrirex is less a nerf to the ghost team as it is a buff to the curio team.” A third voice splits the difference on design: “I think they should have nerfed Petrirex’s scaling OR cooldown, but not both.”

Patch 1.3.0’s cooldown revert reads like an answer to exactly that third position. One more official breadcrumb: the 1.3.0 bugfix list mentions “a Bonshell next to a Petrirex with Shikitsune” reviving a just-knocked-out monster — confirmation that Petrirex sits in revive-adjacent lines where its per-knockout engine keeps firing.

What is still unknown

• Petrirex’s cost, attack, health and per-level values — the knockout payout and Cooldown are the only numbers on official record.
• Any measured performance — no win rate, pick rate, or a single documented high-rank run.
• Whether “Curio type teams” survive contact with 1.3.0: the cooldown came back, the Damage did not, and no thread has re-tested the combo on record.

The monster list keeps the full roster accounting, the Batomon tier list tracks how the three patches graded every engine, and the best teams overview carries the knockout-archetype fallout.