Void knight

The Void knight just outside the bank at Pest control runs the Pest control exchange.

The pest control exchange also has an Experience Exchange where you can exchange pest-tokens for experience in any combat skill.

Skill	Cost	Experience gained
Attack	100 pest tokens	7,950 - 30,000 depending on Attack level
Strength	100 pest tokens	7,950 - 30,000 depending on Strength level
Defence	100 pest tokens	7,950 - 30,000 depending on Defence level
Ranged	100 pest tokens	7,950 - 30,000 depending on Ranged level
Magic	100 pest tokens	7,950 - 30,000 depending on Magic level
Hitpoints	100 pest tokens	7,950 - 30,000 depending on Hitpoints level
Prayer	100 pest tokens	3,975 - 15,000 depending on Prayer level

Rewards

Image	Item	Pest-Tokens	Description
11666;;0.7	Void seal (8)	79	Used to teleport to Void knight outpost, Karamja store, Burthorpe or Slayer tower
11663;;0.7	Void mage helm	1,546	Requires 45 Magic and 45 Defence
11664;;0.7	Void ranger helm	1,546	Requires 45 Range and 45 Defence
11665;;0.7	Void melee helm	1,546	Requires 45 Attack, 45 Strength and 45 Defence
8839;;0.7	Void knight top	2,617	Requires 45 Range, 45 Magic, 45 Strength and 45 Defence
8840;;0.7	Void knight robe	2,617	Requires 45 Range, 45 Magic, 45 Strength and 45 Defence
8842;;0.7	Void knight gloves	1,189	Requires 45 Range, 45 Magic, 45 Strength and 45 Defence
8841;;0.7	Void knight mace	1,427	Requires 60 Magic
19669;;0.7	Ring of Vigour	1,001	10% less energy for every special attack.
19780;;0.7	Korasi's sword	6,344	A strong sword with a high magic damage special attack
3486;;0.7	Gilded full helm	3,124	Rune full helm with a gold plate
3481;;0.7	Gilded platebody	3,124	Rune platebody with a gold plate
3483;;0.7	Gilded platelegs	3,124	Rune platelegs with a gold plate
3485;;0.7	Gilded plateskirt	3,124	Rune plateskirt with a gold plate
3488;;0.7	Gilded kiteshield	3,124	Rune kiteshield with a gold plate
19888;;0.7	Demon horn necklace	20,000	Restores prayer points when burying bones
19785;;0.7	Elite void knight top	3,045	Requires 65 Defence, 65 Strength, 65 Ranged, 65 Magic
19786;;0.7	Elite void knight robe	3,045	Requires 65 Defence, 65 Strength, 65 Ranged, 65 Magic
19787;;0.7	Elite void knight top	3,045	Requires 65 Defence, 65 Strength, 65 Ranged, 65 Magic
19788;;0.7	Elite void knight robe	3,045	Requires 65 Defence, 65 Strength, 65 Ranged, 65 Magic
19789;;0.7	Elite void knight top	3,045	Requires 65 Defence, 65 Strength, 65 Ranged, 65 Magic
19790;;0.7	Elite void knight robe	3,045	Requires 65 Defence, 65 Strength, 65 Ranged, 65 Magic
23367;Pet splatter;0.7	Pet splatter	15,000	Pet
23368;Pet shifter;0.7	Pet shifter	15,000	Pet
23369;Pet ravager;0.7	Pet ravager	15,000	Pet
23370;Pet spinner;0.7	Pet spinner	15,000	Pet
23371;Pet torcher;0.7	Pet torcher	15,000	Pet
23372;Pet defiler;0.7	Pet defiler	15,000	Pet
23373;Pet brawler;0.7	Pet brawler	15,000	Pet
23389;Chalkos bar;0.7	Chalkos bar	130	Can be used to smith Chalkos armour