Fireball

For the Vaal-themed counterpart, see Vaal Fireball.

Fireball is a spell that fires a projectile, dealing fire damage with an increased chance to Ignite.

Skill functions and interactions

• Area of Effect: The radius of the explosion caused by collision (with either an enemy or a terrain obstruction) is affected by all AoE increases, with a base radius of 9. Full spell damage is done to any enemy in range of the explosion. Damage dealt to the initial target that caused the explosion is also affected by AoE damage increases and reductions, however the intial target won't take double damage from the hit and the explosion.

• Pierce, Chain, Fork: Enemies hit by a projectile that pierces, chains, or forks will take full damage from the hit, but the projectile will not explode until it hits an enemy and does not pierce, chain, or fork, or hits a wall. This means that the damage dealt to pierced enemies won't benefit from AoE damage increases.

• Shotgunning: Each enemy can only be hit directly by one projectile per cast. However, if an enemy is in range of the explosion effect of more than one projectile from the same cast, and those projectiles each exploded on different enemies or a wall, it will take full damage from each explosion.

• Can be used in left mouse button slot to cast and move.

Gem level progression

Level			Mana Cost	Fire Damage	Ignite Chance	Radius	Exp.	Total Exp.
1	1	0	6	9 to 14	20%	N/A	0	0
2	2	0	6	10 to 16	21%	N/A	70	70
3	4	16	7	13 to 20	22%	+1	308	378
4	7	22	8	18 to 27	23%	+1	1554	1932
5	11	31	9	26 to 40	24%	+2	6667	8599
6	16	41	10	40 to 60	25%	+2	26047	34646
7	20	50	11	54 to 81	26%	+3	49725	84371
8	24	58	12	72 to 109	27%	+3	95714	180085
9	28	67	13	95 to 143	28%	+4	169595	349680
10	32	75	14	124 to 186	29%	+4	283759	633439
11	36	83	15	159 to 239	30%	+5	453996	1087435
12	40	92	16	204 to 305	31%	+5	703128	1790563
13	44	100	18	258 to 388	32%	+6	1061223	2851786
14	48	109	19	326 to 490	33%	+6	2065870	4917656
15	52	117	20	410 to 615	34%	+7	2507110	7424766
16	56	125	21	513 to 770	35%	+7	5798936	13223702
17	60	134	22	640 to 960	36%	+8	15083919	28307621
18	64	142	23	795 to 1193	37%	+8	27792735	56100356
19	67	148	24	934 to 1401	38%	+9	43869739	99970095
20	70	155	25	1095 to 1643	39%	+9	242081556	342051651
21	72	159	25	1217 to 1826	40%	+10	N/A	N/A
22	74	N/A	26	1352 to 2028	41%	+10	N/A	N/A
23	76	N/A	26	1501 to 2251	42%	+10	N/A	N/A
24	78	N/A	27	1665 to 2497	43%	+10	N/A	N/A
25	80	N/A	27	1846 to 2769	44%	+10	N/A	N/A
26	82	N/A	28	2046 to 3069	45%	+11	N/A	N/A
27	84	N/A	28	2266 to 3399	46%	+11	N/A	N/A
28	86	N/A	29	2509 to 3763	47%	+11	N/A	N/A
29	88	N/A	30	2777 to 4165	48%	+11	N/A	N/A
30	90	N/A	30	3072 to 4608	49%	+11	N/A	N/A
31	91	N/A	30	3231 to 4846	50%	+12	N/A	N/A
32	92	N/A	31	3397 to 5095	51%	+12	N/A	N/A
33	93	N/A	31	3572 to 5358	52%	+12	N/A	N/A
34	94	N/A	31	3755 to 5633	53%	+12	N/A	N/A
35	95	N/A	31	3947 to 5921	54%	+12	N/A	N/A
36	96	N/A	32	4149 to 6224	55%	+13	N/A	N/A
37	97	N/A	32	4361 to 6542	56%	+13	N/A	N/A
38	98	N/A	32	4583 to 6875	57%	+13	N/A	N/A
39	99	N/A	33	4816 to 7224	58%	+13	N/A	N/A
40	100	N/A	33	5061 to 7591	59%	+13	N/A	N/A

In addition, Fireball is the starting skill gem for Witch. It drops after killing the first monster of the game, Hungry Corpse.

Threshold jewels

The following threshold jewels augment Fireball:

Related helmet enchantments

The following helmet enchantments affect Fireball.

Alternate skill effects

Fireball has the following alternate skill effects:

Monsters

Monsters using this skill:

• Goatman Fire-raiser
• Flame Sentinel +
• Solar Guard

Version history

Version	Changes
3.16.0	No longer has a more damage with ignite modifier
3.11.0	Now has an added Damage effectiveness of 240% (from 180%). No longer gains additional explosion radius as the gem levels up. Now gains additional explosion radius based on the distance the projectile has travelled as the gem levels up, up to +9 at gem level 20. Now gains 1% increased Projectile Speed per 1% gem quality (previously 0.5% chance to ignite per 1% gem quality).
3.6.0	Mana Cost at gem level 20 is now 25 (was 26). Now deals 9 to 14 Fire damage at gem level 1 (from 7 to 10) and 1095 to 1643 Fire damage at level 20 (from 890 to 1335). Now has an added damage effectiveness of 180% (from 160%).
3.3.0	Now deals 7-10 fire damage at gem level 1 (same as previously), up to 890 to 1335 fire damage at gem level 20 (up from 739-1109). Now has a cast time of 0.75 seconds (down from 0.85 seconds). Now gains up to +4 to the explosion's radius at gem level 20 (up from +3). Now has an added damage effectiveness of 160% (up from 100%). Now deals 50% more damage with Ignite at gem level 1, up to 88% more at gem level 20.
2.6.0	Fireball gains 1 additional unit of radius every 6 levels. No longer gain increased area of effect radius.
2.4.0	50% more damage at gem level 20.
2.0.0	Damage increased by 15%. It now has a base chance to ignite. Its projectile speed has been increased by 30%.
1.1.0	Increased the damage of Fireball at low and high levels.
1.0.4	The area of effect has been increased by 12%. Damage has been increased at all levels (by around 20% at level one and around 23% at level 15).
0.10.0	Damage progression increased - now 14% increased by level 15.
0.9.12s	Damage progression increased. By skill level 15, it's doing 16% more damage than before.
0.9.7b	Increased the damage at higher levels.
0.9.7	The damage has been increased.
0.9.6	Increased the damage.
0.9.5g	Increased the Critical Strike chance.
0.9.3c	Reduced damage by 5%.
0.9.2	Fireball splash damage is now centered on the monster itself, rather than the point of impact (which was in front of the monster). Increased Fireball's splash Area of Effect. Increased its damage by 23%.
0.7.1	Slightly increased Fireball mana cost and reduced its damage
0.6.13	Major fix to projectile/fireball code (fixed crashes and strange behaviour)