Zalcono is a demon located in a prison beneath Prifddinas, she is immune to regular combat and can only be attacked using skills. The skills needed are mining, smithing, and runecraft, these are used to create imbued tephra which can destroy Zalcano’s stone armour and make her vulnerable to the players’ attack As mentioned, regular combat does not work and players can only deal damage to Zalcano by mining her with the use of a pickaxe when she is vulnerable. Similar to wintertodt, players can fight Zalcano with other players, which makes it a lot easier.
The required items include:
This consists of
Zalcano is located in a prison in Prifddinas which can be accessed from Prifddinas’ Trahaearn district via a teleport platform found west of the southeastern bank shown below
The fastest ways to get to Prifddinas include:
The Current official worlds for fighting Zalcano include:
Head slot - Prospector helmet
Neck slot - stole: this provides a prayer bonus to the player. Alternatively, players can wear a dragonbone necklace if they have one, since it offers more prayer bonus.
Cape slot - mining cape
Body slot - Varrock armour: wearing this item allows the player to mine multiple tephra per action, alternatively, players can wear the graceful for stamina regeneration.
Leg slot - Graceful legs
Weapon slot - Dragon pickaxe: using a dragon pickaxe adds a +1 damage when mining Zalcano, and it also increases the rate at which the player can mine tephra. The player should use the Crystal pickaxe instead if they have one because it adds +2 damage instead of +1. Players who do not have any of these can opt for the rune pickaxe, however, it has no damage bonus.
Shield slot - a God book
Ammo slot - Rada’s blessing: this gives a +2 prayer bonus
Glove slot - Graceful gloves
Boot slot - Graceful boots
Ring slot - Celestial ring: This ring can give the player multiple tephra per mine
To fight Zalcano, players need to know her attacks and how to evade them, she has six different attacks that players must watch out for, all of which have been explained below
Zalcano can stomp on the ground and cause boulders to fall from the ceiling. These falling boulders can be spotted before they reach the ground by the falling pebbles or dirt and shadow on the ground, players should step at least one tile away from where they will land to avoid them. These attacks are very dangerous and can damage the player for 40+. If demonic symbols are summoned along with this, it becomes more difficult to know where the boulders are falling.
Blue Demonic symbol
The player’s damage would be increased by 50% while standing on a blue demonic symbol and attacking Zalcano with imbued tephra.
Orange Demonic symbol
Players should not stand or cross the orange demonic symbols, as it will damage them and reduce their run energy. They deal increasing damage every tick to a maximum of about 21 to 24, these can kill the player if they stand on it and are not paying enough attention.
Zalcano will summon a golem from the prison’s edge. Players should stop the golem from getting to her, or they will restore her armour’s health based on their health when they reach her, if it is at full health, it will restore 50 hitpoints to her. Players can damage the golem with the imbued tephra. If killed, the golem will drop 16 to 24 imbued tephra.
Zalcano can fire a red ball of energy at the glowing red formation, which will deactivate and change it. If the player is standing within 1 tile of the rock formation when this happens, they will take 21+ damage. Players can easily avoid this by walking away from the rock. Another rock formation will begin to glow when this happens.
Zalcano will rise again a few seconds after she has been defeated, and a player has caused her damage. When she rises, she will create a shock wave that will push back, damage, and briefly stun any player that is standing next to her. The shock wave created will also destroy all the imbued tephra in the room. Players can avoid this by standing away from her before she rises again.
The Zalcano will occasionally hit the players within the prison with several pebbles, there is no way to avoid this attack however, players will take only small damage from it.
First off, players have to make Imbued Tephra. This needs to be thrown at Zalcano to damage and remove her armour, when it is removed, the player can mine her to cause damage. Here are the steps to make imbued tephra
The golem has been explained in the Zalcano’s attack section above, It should be ignored when the team is made up of more than 8 players, but in a lesser team, players should kill the golem by attacking it with the imbued tephras.
When Zalcano's armour has been destroyed, she will drop to the floor and become vulnerable to the players’ attacks. Players can damage Zalcano by mining. Ensure to not walk under her as this will cause you to get 7 damage per tick. Players can only mine Zalcano for 12 to 16 seconds, after which, her armour resets to 300 hipoints and a shock wave will be released, so beware.
The damage the player can cause depends on their mining level, as shown below:
To qualify for drops from Zalcano, players must inflict a minimum of 5 shield damage to the boss’s hitpoints. To be eligible for unique rewards or pets, a total combined damage of 31 is required. The rewards from the main drop table and the tertiary table are influenced by the player's total points from the kill. For the tertiary table, damage contributions to hitpoints and the shield are capped at 400 and 300, respectively, allowing for a maximum of 1,000 points.
The player who inflicts the most damage, also known as the MVP, receives an additional 10% of their non-unique loot, rounded up. Players can talk to Rhiannon to choose between receiving item drops or gaining Mining experience. This choice doesn’t affect the unique drop table, which is always rolled, regardless of the player’s selection.
The estimated value of an average Zalcano kill is 200,126.7 GP. Players can kill up to 13 Zalcanos per hour, netting them up to 1.5M GP each hour. Zalcano drops include:
1-3 crystal shards and 
infernal ashes
Runes; Zalcano drops the following runes at a rate of 1/36: 64-480 Blood rune, 295-926 Cosmic rune, 201-831 Death rune, 166-790 Law rune, 47-392 Soul rune, 1-842 Nature rune.
The following materials are dropped at a rate of 1/12. These all come in noted form; 86-800 silver ore, 86-721 gold ore, 77-534 steel bar, and 53-368 mithril bar
Crystal tool seed (1/200), 
Zalcano shard (1/750–1/1,500), 
Smolcano (1/2,250), 
Uncut onyx (1/8,000)
Discord
Trustpilot
