When you first start,you have five available slots to block tasks on the Slayer Block List. But once you hit 300 quest points,you unlock a sixth slot,and upon completing the Lumbridge Elite Diary,a seventh slot becomes available. For players planning to dedicate significant time to OSRS,obtaining the Quest Cape should be a key goal,as it provides access to additional quest rewards and unlocks. Diaries also provide valuable benefits and XP boosts,which can significantly aid your Slayer journey.

Assuming you've unlocked all seven slots and are using Duradel or Kuradel (if you've completed the "While Guthix Sleeps" quest),let's dive into the monsters you may want to block in your Slayer journey. Keep in mind that this list isn't ranked but rather highlights some of the worst offenders for XP efficiency.

Hellhounds

Hellhounds are one of the first monsters that highlight a common theme across this list—single-target tasks are less efficient than multi-target ones. To maximize XP per hour,it's better to focus on monsters you can use a cannon or area-of-effect spells like Ice Burst or Ice Barrage on. Hellhounds are relatively slow to kill and drop few valuable items,mostly dropping low-value items such as clues,Ensouled Heads,or the rare Smoldering Stone. Despite their potential for AFK gameplay and the decent drops from their boss,the experience per kill is underwhelming compared to faster,multi-target alternatives.

Cave Krakens

Like Hellhounds,Cave Krakens have a high Slayer task weight,meaning they're a frequent assignment that you'll want to avoid. These monsters also can't be killed using melee or ranged combat,limiting you to using a Trident of the Swamp or other single-target magic weapons. Their drop table is also lacking,with few valuable items to offset the slower kills. For these reasons,Cave Krakens are a prime candidate for your Block List,as they take considerable time to kill while offering minimal rewards.

Every player needs a lot of RuneScape gold, I suggest you go to a third-party website like RSorder.com to buy, safe and comfortable transactions, and years of experience to ensure the security of your account.