Jacobus

Jacobus is an NPC found in the  Thaumaturgist. He offers to increase the size of player's Accessory Bag in exchange for Coins.

Upgrades

Upgrade	Extra Slots	Cost per +2 Slots	Cumulative	SkyBlock XP gain
1	2	1.5M Coins	1.5M Coins	2 SkyBlock XP
2-5	4~10	5M Coins	21.5M Coins	4~10 SkyBlock XP
6-10	12~20	8M Coins	61.5M Coins	12~20 SkyBlock XP
11-20	22~40	12M Coins	181.5M Coins	22~40 SkyBlock XP
21-99	42~198	20M Coins	1.8B Coins	42~198 SkyBlock XP

A Jacobus Register will be rewarded to the player once they have bought 5 accessory bag upgrades, totaling to 21,500,000 Coins.

Condition	Random Dialogue
None	[NPC] Jacobus: Empty pockets never held anyone back. Only empty heads and empty hearts can do that.
	[NPC] Jacobus: Wealth consists not in having great possessions, but in having few wants.
	[NPC] Jacobus: Coins isn't everything, but everything needs coins.
	[NPC] Jacobus: An investment in knowledge pays the best interest.
	[NPC] Jacobus: The real measure of your wealth is how much you'd be worth if you lost all your coins.
	[NPC] Jacobus: It's not the Steve who has too little, but the Steve who craves more, who is poor.
	[NPC] Jacobus: You must gain control over your coins or the lack of it will forever control you.
	[NPC] Jacobus: If you live for having it all, what you have is never enough.
Condition	Message
Trying to expand the Accessory Bag when it is already maxed	You have reached the maximum amount of Jacobus upgrades! That was NOT a smart business decision.

Accessory Bag Upgrades

Alpha Hypixel Network
Apr 15, 2022		Added Jacobus.
Dec 5, 2025		Added Jacobus as a Garden Visitor.
Jan 30, 2026		Moved Jacobus from 52, 69, -43 to -49.5, 70, -60.5, due to the redesign of the Hub Island.
SkyBlock Prototype
Apr 20, 2022	0.13	Added Jacobus.
Feb 24, 2026	0.24.2	Moved Jacobus from 52, 69, -43 to -49.5, 70, -60.5, due to the redesign of the Hub Island.