Temporary skill boost/Defence

Defence

Boost		Level increase	Visibility	Other info
	Defence cape	1	Visible	Activating the cape's effect will increase the corresponding skill by 1.
	Draynor Manor Cabbage	1 or 2	Visible	Restores 1 Hitpoint. Available to free-to-play players.
	Kebab	1-3	Visible	4% chance to do so. Available to free-to-play players.
	Poison chalice	1 or 4	Visible	Has a variety of beneficial and disastrous effects.
	Spicy stew (red spice)	±0-5	Visible	Depending on type of stew, any skill can be boosted or reduced by 0 to 5 levels randomly.
	Excalibur	8	Visible	Uses up 100% Special attack energy.
	Defence potion	3-12	Visible	Boosts Defence by $\lfloor {\text{Level}}\times {\frac {10}{100}}+3\rfloor$. Defence boosts do not allow players to equip higher level armour.
	Abidor Crank	3-12	Visible	Provides benefits of a defence potion.
	Elder (-)	4-13	Visible	Boosts Attack, Strength, and Defence by $\lfloor {\text{Level}}\times {\frac {10}{100}}+4\rfloor$. Only usable within the Chambers of Xeric, and is the weakest variant
	Overload (-)	4-13	Visible	Acts as an elder (-), twisted (-), and kodai (-) potion in one dose. Boosts combat stats by $\lfloor {\text{Level}}\times {\frac {10}{100}}+4\rfloor$ (excluding Hitpoints and Prayer). The boost is reapplied every 15 seconds for 5 minutes. Also damages the player for 50 Hitpoints. (This lost health is refunded after the overload ends.) Only usable within the Chambers of Xeric, and is the weakest variant
	Elder potion	5-17	Visible	Boosts Attack, Strength, and Defence by $\lfloor {\text{Level}}\times {\frac {13}{100}}+5\rfloor$. Only usable within the Chambers of Xeric, and is the standard variant
	Overload (Chambers of Xeric)	5-17	Visible	Acts as an elder, twisted, and kodai potion in one dose. Boosts combat stats by $\lfloor {\text{Level}}\times {\frac {13}{100}}+5\rfloor$ (excluding Hitpoints and Prayer). The boost is reapplied every 15 seconds for 5 minutes. Also damages the player for 50 Hitpoints. (This lost health is refunded after the overload ends.) Only usable within the Chambers of Xeric, and is the standard variant
	Sapphire glacialis (item)	4-18	Visible	Boosts Defence by $\lfloor {\text{Level}}\times {\frac {15}{100}}+4\rfloor$. Must be used on another player. Boost affects the player it is used on. Acquired from the Hunting skill.
	Bandages (Theatre of Blood)	4-18	Visible	Acts like a super combat (minus one point), ranging, magic, prayer, and stamina potion, and heals 20 Hitpoints.
	Super defence	5-19	Visible	Boosts Defence by $\lfloor {\text{Level}}\times {\frac {15}{100}}+5\rfloor$. Defence boosts do not allow players to equip higher level armour.
	Divine super defence potion	5-19	Visible	Acts as a super defence potion. Natural stat draining for Defence is disabled for 5 minutes, meaning the player's Defence will stay fully boosted. After the 5 minutes are over, Defence level will be restored to its base level.
	Super combat potion	5-19	Visible	Acts as a super attack, super strength, and super defence potion in one dose. Boosts Attack, Strength, and Defence by $\lfloor {\text{Level}}\times {\frac {15}{100}}+5\rfloor$.
	Divine super combat potion	5-19	Visible	Acts as a super combat potion. Natural stat draining for Attack, Strength, and Defence is disabled for 5 minutes, meaning the player's combat stats will stay fully boosted. After the 5 minutes are over, affected stats will be restored to their base level.
	Bastion potion	5-19	Visible	Acts as a ranging and super defence potion in one dose. Boosts Ranged by $\lfloor {\text{Level}}\times {\frac {10}{100}}+4\rfloor$ and Defence by $\lfloor {\text{Level}}\times {\frac {15}{100}}+5\rfloor$.
	Divine bastion potion	5-19	Visible	Acts as a bastion potion. Natural stat draining for Ranged and Defence is disabled for 5 minutes, meaning the player's combat stats will stay fully boosted. After the 5 minutes are over, affected stats will be restored to their base level.
	Battlemage potion	5-19	Visible	Acts as a magic and super defence potion in one dose. Boosts Magic by $4$ and Defence by $\lfloor {\text{Level}}\times {\frac {15}{100}}+5\rfloor$. Allows for the use of higher level magical spells.
	Divine battlemage potion	5-19	Visible	Acts as a battlemage potion. Natural stat draining for Magic and Defence is disabled for 5 minutes, meaning the player's combat stats will stay fully boosted. After the 5 minutes are over, affected stats will be restored to their base level.
	Overload (Nightmare Zone)	5-19	Visible	Acts as a super combat, super ranging, and super magic potion in one dose. Boosts combat stats by $\lfloor {\text{Level}}\times {\frac {15}{100}}+5\rfloor$ (excluding Hitpoints and Prayer). The boost is reapplied every 15 seconds for 5 minutes. Also damages the player for 50 Hitpoints. (This lost health is refunded after the overload ends.) Only usable within the Nightmare Zone
	Saradomin brew	2-21	Visible	Boosts Defence by $\lfloor {\text{Level}}\times {\frac {20}{100}}+2\rfloor$ and Hitpoints by $\lfloor {\text{Level}}\times {\frac {15}{100}}+2\rfloor$. Reduces Attack, Strength, Magic and Ranged levels by $\lfloor {\text{Level}}\times {\frac {10}{100}}+2\rfloor$. Hitpoints can rise above normal level with the boost.
	Elder (+)	6-21	Visible	Boosts Attack, Strength, and Defence by $\lfloor {\text{Level}}\times {\frac {16}{100}}+6\rfloor$. Only usable within the Chambers of Xeric, and is the strongest variant
	Overload (+)	6-21	Visible	Acts as an elder (+), twisted (+), and kodai (+) potion in one dose. Boosts combat stats by $\lfloor {\text{Level}}\times {\frac {16}{100}}+6\rfloor$ (excluding Hitpoints and Prayer). The boost is reapplied every 15 seconds for 5 minutes. Also damages the player for 50 Hitpoints. (This lost health is refunded after the overload ends.) Only usable within the Chambers of Xeric, and is the strongest variant