DnD/Magic Items

Imp with Necklace of Fireballs would a good protector for a big boss battle

Necklace of Fireballs - https://www.dndbeyond.com/magic-items/necklace-of-fireballs

Magic Item Price

Magic Item Price
Rarity      Asking Price* 	 
Common      (1d6 + 1) × 10 gp 	 
Uncommon    1d6 × 100 gp 	 
Rare        2d10 × 1,000 gp 	 
Very rare   (1d4 + 1) × 10,000 gp 	 
Legendary   2d6 × 25,000 gp 	 

• Halved for a consumable item like a potion or scroll

ref: https://www.dndbeyond.com/sources/dnd/xgte/downtime-revisited#MagicItemPrice

Complications

Magic Item Purchase Complications

d12 	Complication
1 	The item is a fake, planted by an enemy.*
2 	The item is stolen by the party’s enemies.*
3 	The item is cursed by a god.
4 	The item’s original owner will kill to reclaim it; the party’s enemies spread news of its sale.*
5 	The item is at the center of a dark prophecy.
6 	The seller is murdered before the sale.*
7 	The seller is a devil looking to make a bargain.
8 	The item is the key to freeing an evil entity.
9 	A third party bids on the item, doubling its price.*
10 	The item is an enslaved, intelligent entity.
11 	The item is tied to a cult.
12 	The party’s enemies spread rumors that the item is an artifact of evil.*

ref: https://www.dndbeyond.com/sources/dnd/xgte/downtime-revisited#MagicItemPurchaseComplications