Sinister Offering

Sinister Offering
Released		16 June 2021 (Update)
Members		Yes
Level		92
Spellbook		Arceuus
Type		Utility
Experience		180
Runes		1 1
Cooldown		9 ticks
Quest		A Kingdom Divided
Description		Converts bones into prayer points and experience
Animation
Sound effect

Sinister Offering is a spell within the Arceuus spellbook that requires level 92 Magic and the completion of A Kingdom Divided to be cast. When cast, the spell instantly offers up to three bones in the player's inventory, granting 300% the normal experience for burying them. Players must have level 70 Prayer in order to offer superior dragon bones via the spell. Players may only cast offering spells once every 5.4 seconds.

The spell also restores one prayer point for each set of bones converted; for Ourg, dagannoth, hydra, and superior dragon bones, two prayer points are restored instead.

The spell can be cast without runes at the Fountain of Rune.

Cost

Spell cost

Input	Cost
1 1	584

Prayer experience

	Bones	XP	Spell XP	Purchased Bones	Spell Only (Excluding Bone Cost)	XP/Hr
				GP/XP	GP/XP
	Bones	13.5	40.5	−17.01	−14.42	24,300
	Monkey bones	15	45	−34.84	−12.98	27,000
	Bat bones	15.9	47.7	−38.03	−12.24	28,620
	Big bones	45	135	−11.93	−4.33	81,000
	Jogre bones	45	135	−19.30	−4.33	81,000
	Wyrmling bones	63	189	−8.19	−3.09	113,400
	Zogre bones	67.5	202.5	−12.37	−2.88	121,500
	Shaikahan bones	75	225	−94.74	−2.60	135,000
	Babydragon bones	90	270	−8.84	−2.16	162,000
	Wyrm bones	150	450	−10.32	−1.30	270,000
	Strykewyrm bones	180	540	−10.75	−1.08	324,000
	Dragon bones	216	648	−11.63	−0.90	388,800
	Wyvern bones	216	648	−11.48	−0.90	388,800
	Drake bones	240	720	−15.62	−0.81	432,000
	Fayrg bones	252	756	−17.46	−0.77	453,600
	Lava dragon bones	255	765	−19.87	−0.76	459,000
	Raurg bones	288	864	−26.50	−0.68	518,400
	Frost dragon bones	300	900	−20.76	−0.65	540,000
	Hydra bones	330	990	−21.86	−0.59	594,000
	Dagannoth bones	375	1125	−32.61	−0.52	675,000
	Ourg bones	420	1260	−119.24	−0.46	756,000
	Superior dragon bones	450	1350	−51.18	−0.43	810,000

Changes

Date	Changes
15 November 2023 (Update)	The spell no longer consumes long and curved bones.
4 August 2021 (Update)	The spell can now be performed without interrupting the player's actions.
30 June 2021 (Update)	Offering spells are now cast instantly, and have a cooldown of 9 game ticks (5.4 seconds).