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ThunderstoneItem 1+

AlchemicalBombConsumableSonicSplash
Source Core Rulebook pg. 546
Usage held in 1 hand; Bulk L
When this stone hits a creature or a hard surface, it explodes with a deafening bang. A thunderstone deals the listed sonic damage and sonic splash damage, and each creature within 10 feet of the space in which the stone exploded must succeed at a Fortitude saving throw with the listed DC or be deafened until the end of its next turn. Many types of thunderstone grant an item bonus to attack rolls.

Activate Single ActionSingle Action Strike

Thunderstone (Lesser)Item 1

Source Core Rulebook pg. 546
Level 1; Price 3 gp
The bomb deals 1d4 sonic damage and 1 sonic splash damage, and the DC is 17.

Thunderstone (Moderate)Item 3

Source Core Rulebook pg. 546
Level 3; Price 10 gp
You gain a +1 item bonus to attack rolls. The bomb deals 2d4 sonic damage and 2 sonic splash damage, and the DC is 20.

Thunderstone (Greater)Item 11

Source Core Rulebook pg. 546
Level 11; Price 250 gp
You gain a +2 item bonus to attack rolls. The bomb deals 3d4 sonic damage and 3 sonic splash damage, and the DC is 28.

Thunderstone (Major)Item 17

Source Core Rulebook pg. 546
Level 17; Price 2,500 gp
You gain a +3 item bonus to attack rolls. The bomb deals 4d4 sonic damage and 4 sonic splash damage, and the DC is 36.