Weapon Skills

Weapon Skills are modifiers found on Rare and higher weapons. These skills give stat bonuses to certain types of characters, or provide other bonuses based on the skill.

Most weapon skills have 2 parts: the base skill, and the skill level. The base skill has a fixed effect, such as "% boost to allies' ATK," and the skill level amplifies the effect by increasing that base percentage. For weapons with maximum levels of 100 or lower, the maximum skill level is 10. For weapons with maximum levels of 150, the maximum skill level is 15. For most weapons, each skill level from 1-10 increases the base effect by 1%, while each skill level from 11-15 increases the base effect by less than 1%.

There are some skills that require the weapon to be a certain level. This naturally also requires the weapon to be uncapped enough for you to reach that level. Refer to individual weapon pages to determine if that weapon has such a skill.

Each party uses 1 main weapon and up to 9 sub weapons. This is colloquially referred to as the "weapon grid." The main weapon dictates the element and charge attack of your main character, but weapon skills on all weapons in your grid are always active (apart from a few exceptions specifically stating so) and will strengthen all applicable characters in your party.

Raising Weapon Skills

Raising weapon skill levels requires sacrificing other weapons with skills or Fury Pebbles/Fury Stones as upgrade fodder. When upgrading a weapon with another weapon with a skill and/or Fury items, the upgrade summary will state "Skill Level Rise Rate: X%." This is the chance your weapon will gain a skill level if you perform this upgrade. Depending on the weapon rarity and current skill level, different amounts of upgrade fodder is needed to reach a 100% chance.

To make calculations easier, the Granblue Fantasy community has assigned point values to common upgrade fodder and created a table of skill levels with the number of points needed to reach a 100% chance of upgrading a weapon's skill. Note that 100% is the highest rate you can get; using more points than necessary will not allow you to get more than 1 skill up per upgrade.

Fodder (skill level 1)	Points
01	1
02	4
03	40
Fury Pebble	2
Fury Stone	4.8

A fodder weapon or Fury Pebble/Stone is worth as many points as its base form times its skill level, e.g. Yggdrasil Bark is normally worth 4 points, but an Yggdrasil Bark with skill level 3 (sk3) is worth 12 points.

For scenarios requiring 56-80 points (SSR sk7-10), it is more efficient to skill up a fodder SSR rather than to use base materials. A SSR sk2 is worth 80 points, but it only requires 1 SSR sk1 plus 2 SRs sk1 to create it. That means your base materials are worth only 48 points, but you are creating skill fodder worth 80 points.

To make a SSR sk3, you need a SSR sk1, 2 SR sk1 for the first skill up, and 4 SR sk1 for the second skill up. So you are putting in 64 points to make fodder worth 120 points. This does mean that going from SSR sk11->12, it's more efficient to skill up using 1 SSR sk2 and (2 SR sk1 or 1 SR sk2), but for the rest of the skill levels a SSR sk3 will be the most efficient course.

	Points for 100% skill up
Level	02	03	Baha
1→2	4	8	40
2→3	8	16	80
3→4	12+	24+	120
4→5	16	32	160
5→6	20	40	200
6→7	24	48+	240
7→8	28	56+	280
8→9	32	64	320
9→10	36	72	360
10→11	-	80	400
11→12	-	88	440
12→13	-	96	480
13→14	-	104	520
14→15	-	112	560

• Note: The + indicates that attempting to level skill with the exact number of points may result in a 99% success rate. This can result in failure, so it is recommended to just find 1 more R weapon to reach 100%.
• Example using this chart: To level up a SSR sk4, you need to feed it 32 points worth of fodder, which could be 8 SRs, or 6 SRs + 8 Rs, or 4 SRs + 16 Rs.

Bahamut Weapons

Bahamut Weapons require 40 points, or 1 03, per skill level. So, knowing that it only requires 8 points per skill level to skill up a standard 03, you can imagine how to make the Bahamut Weapon skill up process less painful. However, depending on how many fodder 03 weapons you have available, certain combinations can be even more efficient than simply skilling up one SSR.

Current Skill Level	Points	Fodder	Value
1	40	03 x1	40
		02 x10	40
		02 sk2 x5	40
2	80	03 x2	80
		03 sk2 = 03 + 02 x2	48
3	120	03 x3	120
		03 sk3 = 03 + 02 x6	64
4	160	03 x4	160
		03 sk2 x2 = 03 x2 + 02 x4	96
		03 sk4 = 03 + 02 x12	88
5	200	03 x5	200
		03 sk3 + sk2 = 03 x2 + 02 x8	112
		03 sk5 = 03 + 02 x20	120
6	240	03 x6	240
		03 sk2 x3 = 03 x3 + 02 x6	144
		03 sk3 x2 = 03 x2 + 02 x12	128
		03 sk6 = 03 + 02 x30	160
7	280	03 x7	280
		03 sk3 + sk2 x2 = 03 x3 + 02 x10	160
		03 sk4 + sk3 = 03 x2 + 02 x18	152
		03 sk7 = 03 + 02 x42	208
8	320	03 x8	320
		03 sk3 x2 + sk2 = 03 x3 + 02 x14	176
		03 sk4 x2 = 03 x2 + 02 x24	176
		03 sk8 = 03 + 02 x56	264
9	360	03 x9	360
		03 sk3 + sk2 x3 = 03 x4 + 02 x14	216
		03 sk3 x3 = 03 x3 + 02 x18	192
		03 sk5 + sk4 = 03 x2 + 02 x32	208
		03 sk9 = 03 + 02 x72	328
10	400	03 x10	400
		03 sk3 x2 + sk2 x2 = 03 x4 + 02 x20	240
		03 sk4 + sk3 x2 = 03 x3 + 02 x24	216
		03 sk5 + sk5 = 03 x2 + 02 x40	240
		03 sk10 = 03 + 02 x90	400
11	440	03 x11	440
		03 sk3 x3 + sk2 = 03 x4 + 02 x24	256
		03 sk4 x2 + sk3 = 03 x3 + 02 x30	240
		03 sk6 + sk5 = 03 x2 + 02 x50	280
12	480	03 x12	480
		03 sk3 x4 = 03 x4 + 02 x28	272
		03 sk4 x3 = 03 x3 + 02 x36	264
		03 sk6 x2 = 03 x2 + 02 x60	320
13	520	03 x13	520
		03 sk4 + sk3 x3 = 03 x4 + 02 x34	296
		03 sk5 + sk4 x2 = 03 x3 + 02 x44	296
		03 sk7 + sk6 = 03 x2 + 02 x72	368
14	560	03 x14	560
		03 sk4 x2 + sk3 x2 = 03 x4 + 02 x40	320
		03 sk5 x2 + sk4 = 03 x3 + 02 x52	328
		03 sk7 x2 = 03 x2 + 02 x84	416

So what we discover here is that, even though 03 sk5 is still very efficient (generates 200 points but only requires 120 to create), it is actually more efficient to use multiple SSRs to add up to a skill of 5 instead. However, this method relies on having access to many extra SSRs, so this information may or may not be useful to every player.

Weapon Skill Types

There are 3 weapon skill types:

• Normal - Generally found on Draw and event weapons.
  • The Normal type includes Normal II weapons and Bahamut Weapons.
• Omega - Found on weapons named after the tier 1 raids.
• Unknown - Found on collaboration event weapons.

The three skill types modify their own multipliers and can be boosted by certain summons:

• Normal skills are boosted by Premium Draw summons, specifically Agnis (fire), Varuna (water), Titan (earth), Zephyrus (wind), Zeus (light), and Hades (dark).
• Omega skills are boosted by the element's respective Omega summon.
• Mysterious skills, a type of Unknown, are boosted by the Ranko Kanzaki summon.

For more details on damage multipliers and team building strategy, see Damage Formula and Team Building.

Standard Weapon Skills

• Attack Up
  • Skill Name: Might
  • Increases elemental ATK by 0%/2%/5%/6% (small, medium, big, Normal II). Each skill level increases the boost by 1% until level 10, and 0.4%/0.5%/0.6% after level 10.

• Health Up
  • Skill Name: Aegis
  • Increases the health of characters of the skill's element. Normal HP effects are much more powerful (3%/6%/9%) than Omega and Unknown HP skills (1%/3%/6%).
    
  • The "Titan's Aegis" skill on the Broadsword of Earth is a flat +500 HP to all characters.

• Last Stand
  • Alternate Term: Backwater
    
  • Skill Name: Enmity
  • Damage increases as HP decreases. See Enmity for details.

• Critical
  • Skill Name: Verity
  • Chance to deal an additional 50% damage to weak elements.

• Counter
  • Skill Name: Clarity
  • Chance to evade an enemy's normal attack and counterattack.

• Double Attack Up
  • Skill Name: Dual-Edge
  • Increases the rate of double attacks.

• Healing Cap Up
  • Skill Name: Healing
  • Increases the maximum amount that can be healed per skill.

Unique Weapon Skills

Skills that only appear on special weapons.

• Attack Up/HP Up
  • Skill Name: Majesty
    
  • Appears on: Perseus, Auberon, Caduceus, Luminiera Sword Omega
    
  • Increases Attack and HP by a small amount (base +1%)

• Attack Up/HP Down
  • Skill Name: Tyranny
    
• Appears on: Nalakuvara, Cortana, Freikugel
  
  • Large Attack modifier, but reduces HP by 10%

• Double Attack/Crit
  • Skill Name: Restraint
    
  • Appears on: Hercules, Auberon
    
  • Medium increase to Double Attack and Crit Rate.

• Honor Up
  • Appears on: Flohrenberk (Level 100 only)
    
  • Honor applied towards event rewards is increased by 10%.

• Experience Up
  • Appears on: Anemoi Silver Lyre
    
  • Increases EXP gain

• Item Drop Rate Up
  • Appears on: Septian Burner
    
  • Increases drop rate akin to the Treasure Hunter effect

• Auto Attack Up
  • Skill Name: Tyranny
    
  • Appears on: Nalakuvara
    
  • All characters begin the battle with an attack buff.

• Auto Defense Up
  • Skill Name: Preemptive Wall
    
  • Appears on: Lohengrin, Broadsword of Earth
    
  • All characters begin the battle with a defense buff.

Cosmos Weapon Skills

Cosmos weapons have two skills, depending on their weapon type and class type.

• The first skill boosts the stats of all weapons of the same type by 30%. This stacks additively with the 20% bonus for preferred weapons.
• The second skill gives an effect to all characters that match its class type:
  • characters have increased Attack but lowered max HP.
  • characters have increased Defense and max HP.
  • characters have improved healing and gain Refresh.
  • characters have increased Defense and Double Attack Rate.
  • characters have increased Debuff Resistance and Debuff Success Rate.