Poison Resistance

Poison Resistance is an elemental-attribute resistance skill.

Official description
In the description below,  would be replaced by A-rank, S-rank, and so on depending on the skill instance: "Complete immunity to poisons lower than [skill rank]"

Origin
This is a supplementary skill of the title Dragon Slayer, specifically the variant earned from killing the 1st rank curse and poison dragon king Rauchitas. It is also likely obtained as a supplementary skill of the Dio Valshesis' Twin title.

It is almost certainly possible to obtain this skill independent of the title, as references are made to accommodations being made for Poison Resistance-bearing Hunters. However, high-ranking Poison Resistances (up to A-rank) are relatively rare, with a grand total of 2 S-rank Poison Resistance skill owners and 1 L-rank owner worldwide.

Effects
This skill nullifies any poisons up to but not including the skill's own rank; therefore, an L-rank skill would nullify up to an SSS-rank poison. What is classified as a poison is not limited to the culturally-accepted definition of poisons (being something designed to harm or kill); substances nullified by Poison Resistance range from traditional poisons and drugs to alcohol and even certain medicinal drugs. Specifically, any substance that has past a certain threshold of toxicity to the body or a particularly strong effect is blocked by Poison Resistance. Due to this, it is common to have bearers of Poison Resistance skills registered as such at Hunter-exclusive hospitals, in order to prevent medical accidents.

The skill also nullifies lingering effects of poisons, including hangovers and soreness.

Known holders

 * Han Yoojin (title supplementary skill, L-rank)
 * Riette and Noah Luire (title supplementary skill, S-rank)
 * The Black Flat-Backed Bug monsters

Synopsis
Han Yoojin received this skill as a supplementary skill from Dragon Slayer, first noticing it immediately after his regression.

With his L-rank Poison Resistance as insurance, Yoojin purchases four Black Poison Fog Rings as wide-ranged weapons against monsters. Due to Han Yoohyun being unaware of his Poison Resistance skill, however, these are later confiscated and never see use.

When Han Yoojin goes out drinking with Kim Sunghan, he finds himself completely unaffected by the high amounts of alcohol he drinks, and correctly identifies the cause as Poison Resistance. He manages to disable this skill, but pays for it by immediately becoming intensely inebriated, and wakes up the next day with a severe hangover that he manages to dispel by re-enabling this skill.

The immoral people alter the Poison Resistance skill's Information Window and insert a message asking Yoojin to come meet them.

When he gets kidnapped for the first time, Yoojin is unaffected by the Watchman's Fruit item as well as Blackie's Sticky Poison skill due to this resistance.

A certain E-rank bug monster species, the Black Flat-Backed Bug, has strong Poison Resistance (relative to their rank).

During the fight between Noah Luire and Bak Yerim alongside Han Yoojin, Yoojin uses his Poison Resistance to nullify the S-rank poison inflicted by Noah on himself and Yerim.

Yoojin uses Poison Resistance to demonstrate to Yoohyun and Yerim the ability to enable and disable high-rank resistances. Later, while handling the aftermath of the fight against Noah, Song Taewon also provides Han Yoojin with medical resources required by those who have Poison Resistance, explaining what it works and doesn't work against.

When Diarma orders Riette Luire to attack Han Yoojin and kill Sung Hyunjae, his vessel releases a powerful poison upon being destroyed, but Riette is immune due to her Poison Resistance as a Dio Valshesis.

Yoojin disables Poison Resistance when taking medicine for a slight cold after visiting the immoral people's custom dungeon, using a note on his phone to remind himself to turn it back on afterwards.

Yoojin uses his Poison Resistance to protect Sung Hyunjae during the fight against the dragon humanoid Vicus, as well as to defend himself during the fight against Diarma immediately after.

When going out for drinks with Song Taewon, Yoojin keeps Poison Resistance activated so as to keep up.

Trivia

 * There exist medicines and medicinal drugs that are made with dungeon byproducts in order for use by Hunters, specifically designed to bypass weaker Poison Resistances; these include among their number a B-rank painkiller.