diff --git a/data/entity/npc/monster/undead/corpse/corpse.npcs.toml b/data/entity/npc/monster/undead/corpse/corpse.npcs.toml
index eb9c0730e2..a1d4d402bb 100644
--- a/data/entity/npc/monster/undead/corpse/corpse.npcs.toml
+++ b/data/entity/npc/monster/undead/corpse/corpse.npcs.toml
@@ -4,7 +4,8 @@ hitpoints = 47
 combat_def = "corpse_spider"
 respawn_delay = 3
 drop_table = "corpse_spider"
-categories = ["corpse_spider"]
+categories = ["spiders", "zombies", "undead"]
+slayer_xp = 6.6
 examine = "A wretched dead soul forced into a spider's shape."
 
 [crawling_corpse_torso]
@@ -13,7 +14,8 @@ hitpoints = 87
 combat_def = "crawling_corpse_torso"
 respawn_delay = 3
 drop_table = "crawling_corpse_torso"
-categories = ["crawling_corpse_torso"]
+categories = ["zombies", "undead"]
+slayer_xp = 16.6
 examine = "A wretched creature brought back against its will."
 
 [crawling_corpse_torso_1]
@@ -34,7 +36,8 @@ hitpoints = 90
 combat_def = "corpse_archer"
 respawn_delay = 3
 drop_table = "corpse_archer"
-categories = ["corpse_archer"]
+categories = ["zombies", "undead"]
+slayer_xp = 27.8
 examine = "Bones and arrows."
 
 [corpse_archer_1]
@@ -75,7 +78,8 @@ hitpoints = 99
 combat_def = "corpse_mage"
 respawn_delay = 3
 drop_table = "corpse_mage"
-categories = ["corpse_mage"]
+categories = ["zombies", "undead"]
+slayer_xp = 29.0
 examine = "It casts the magic of death to ease its suffering."
 
 [corpse_mage_1]