Focus: Luthier & Delthea's Battle

Focus: Luthier & Delthea's Battle
Focus: Luthier & Delthea's Battle	Featured units	Luthier: Odd Wayfarer Sonya: Vengeful Mage Delthea: Free Spirit
	Start date	2022-08-25
	End date	2022-09-02
	Description	To accompany the start of Bound Hero Battle: Luthier & Delthea, Luthier: Odd Wayfarer, Delthea: Free Spirit, and Sonya: Vengeful Mage will be part of a 5★ summoning focus! (Notification)

Appearance rates

See Summonable Heroes for a full table of the regular pool of summonable heroes.

Number of units in a pool
	5★ Focus	5★	4★ SR	4★	3★
Red	0	25	55	41	41
Blue	1	25	37	43	43
Green	2	20	32	33	33
Colorless	0	19	25	40	40

Orb color distribution
	Red	Blue	Green	Colorless
Individual	25.71%	27.51%	22.45%	24.33%
All	0.11%	0.16%	0.06%	0.09%
At least one	77.38%	79.99%	71.94%	75.19%
None	22.62%	20.01%	28.06%	24.81%

Average Orbs cost
	Any	Red	Blue	Green	Colorless
Non 3/4★	45 ≈ 11	60 ≈ 13	46 ≈ 10	31 ≈ 7	87 ≈ 19
5★ / 4★ SR	60 ≈ 15	60 ≈ 13	74 ≈ 16	74 ≈ 16	87 ≈ 19
5★ Focus	97 ≈ 24	–	99 ≈ 21	47 ≈ 10	–
5★	97 ≈ 24	104 ≈ 22	110 ≈ 24	114 ≈ 24	122 ≈ 26
4★ SR	140 ≈ 35	114 ≈ 24	183 ≈ 39	175 ≈ 37	246 ≈ 52

The orb color distribution table displays the chances for a certain orb color to appear.
- Individual: The chance for a randomly selected orb to be a certain color.
- All: The chance for all orbs to be a certain color.
- At least one: Chance for at least one of this orb color to show up in a summoning session.
- None: Chance for no orbs of this color to show up in a summoning session.
The Hero rates tables shows the chances for specific Heroes.
- Appearance rate: Individual appearance rate. This is the chance for a randomly selected orb to contain the Hero. This includes all focus and non-focus rarities for the Hero. This rate × 5 is the chance for the Hero to show up at all in one of the 5 orbs in a summoning session.
- Rate | Orb color: The chance to summon a specific Hero given that their orb color has appeared and is being summoned from. This is dependent on color distribution of units in all the pools. This includes all rarities focus and non-focus rarities of the Hero.
The average orb cost table displays the average number of summons and their corresponding average number of {{It|Orb}}s required to obtain a desired kind of Hero.
- Any: All 5 orbs of a summoning sessions are used, independently of their color.
- Red, Blue, Green, Colorless: Only the orbs of the corresponding color are selected. The cost of a summon is inversely proportional to the distribution of its color.

For more detailed information, see Summon#Color Distribution.

Hero	Weapon	Assist	Special	Passive A	Passive B	Passive C
Luthier: Odd Wayfarer	Wind Elwind Gronnfox Gronnfox+	—	Night Sky Glimmer	Death Blow 1 Swift Sparrow 1 Swift Sparrow 2	Guard 1 Guard 2 Guard 3	—
Sonya: Vengeful Mage	Wind Elwind Rexcalibur Dark Excalibur	—	New Moon Moonbow	Warding Blow 1 Mirror Strike 1 Mirror Strike 2	—	Res Ploy 1 Res Ploy 2 Res Ploy 3
Delthea: Free Spirit	Thunder Elthunder Thoron Dark Aura	—	Miracle	Death Blow 1 Death Blow 2 Death Blow 3	—	Spur Atk 1 Drive Atk 1 Drive Atk 2