Chemical X

Chemical X is a harmful instant mob effect added by Mutant Monsters. It is available as a potion, a splash potion, a lingering potion and a tipped arrow. Chemical X does not damage or heal the creature it hits. Instead it summons a Skull Spirit onto each eligible mob. The spirit latches onto the mob, explodes, and in most cases replaces the mob with a much larger mutant version of itself: a Mutant Creeper, Mutant Enderman, Mutant Skeleton, Mutant Snow Golem or Mutant Zombie. A pig becomes a Spider Pig only if it also has the Unluck effect.

Chemical X is the main way to create mutants deliberately. A player who wants a mutant can brew the potion and throw it at ordinary mobs. Converted mobs are made persistent, so they do not despawn on their own. Players and non-mob entities are not affected by the effect.

Effects

Chemical X is an instant effect. Its duration does not apply, and its amplifier has no effect on the outcome. The effect is applied once to each entity that a drunk or thrown potion reaches. It is classed as harmful and uses the colour black.

Effect	Type	Color	Modifiers	Description
Chemical X	Harmful	#000000

Obtaining Chemical X

Chemical X is brewed. The base is a Thick potion, and the second ingredient is one of the following:

• an Endersoul Hand
• a Creeper Shard
• a Mutant Skeleton Skull

The brewing recipe is listed on Potions and Brewing. The splash, lingering and tipped arrow forms of Chemical X are made from the same potion.

Skull Spirit

When Chemical X takes effect on a mob, the game spawns a Skull Spirit at that mob's position. The spirit is a short-lived entity with no natural spawns. It moves toward its target and attaches when it comes within 1 block of it. Once attached, it runs the following sequence:

• The target is pushed sideways by a small random amount every tick.
• The target takes a zero-damage magic hit on average once every 8 ticks.
• The spirit stays attached for 80 to 119 ticks, which is about 4 to 6 seconds.
• When the timer ends, the spirit explodes with a radius of 2 blocks. The explosion does not destroy blocks. It damages nearby entities, but it spares the attached target and any entity that Chemical X cannot affect, so bosses, mutants, Creeper Minions and Endersoul Clones nearby are unharmed.
• The spirit is removed. If its target dies before the timer ends, the spirit is removed at once.

Conversion

The spirit converts its target only if all of the following hold:

• The target is an adult mob with a mutant counterpart. Babies are never converted.
• A pig has the Unluck effect.
• A random roll succeeds. The chance is 3 in 4. On a failed roll the spirit explodes but nothing changes.

On a successful conversion, the mob is replaced by its mutant form at the same position. The spirit's explosion happens first. The blocks in the mutant's footprint are then destroyed, and any block that can be broken drops its item. Bedrock-like blocks that cannot be broken are left in place. The mutant is set to be persistent. If the player who caused the effect is online, that player receives the Summoned Entity criterion, so a player who throws the potion at a mob is credited with the conversion.

Chemical X has no effect at all on the following mobs. No spirit is spawned for them:

• boss mobs
• mobs that are already mutants
• Creeper Minions and Endersoul Clones

Fear Nightfall notes

Chemical X is not changed by the Fear Nightfall pack. Mutant variants are also added to the vanilla monster spawn lists in every biome, at a default spawn weight of 0.05 for the mutant creeper, enderman, skeleton and zombie. Mutants can therefore appear on their own, without any potion, which makes a dark, horror-heavy night more dangerous.

Tips

• Throw the splash potion at a group of adult zombies or skeletons to create several persistent mutants at once. Keep your distance, because the explosion has a 2-block radius.
• Babies cannot be converted. A splash potion on a baby zombie only causes the explosion.
• A pig needs the Unluck effect before Chemical X will turn it into a Spider Pig.
• A mob that has already been converted cannot be converted again, so a mutant will not be replaced by another mutant.