Possession Effects

The Retention Effects System (보유 효과 시스템, boyu hyogwa sisteutem)^ⓘ is a feature added with the Korean Chapter 5 patch in 2017, which unlocks party effects for the player's account when specific Transcended Units are owned.

The effects are comparable to the old Party Effects, where Units in a party can trigger unique effects when paired with one another. However, that restriction is not present with this system, allowing more flexible parties.
Therefore, while Party Effects required the specific units to activate the effect, the Retention Effects unlock the effect just by owning the required Transcended.

The system was added as Flint's measurement to ensure that even unused Transcended Units can contribute to the battle and stay relevant, if possible even attractive enough to create just to unlock the specific Effect.

However, due to the difficulty for lower ranked players to obtain the necessary Units for an effect, combined with the wide variety of the displayed effects, the disparity between top and low ranked players increased.

List of Retention Effects

The effect's strenght increases when all Units required for that effect reached the respective Enhancement level.
For example, to unlock "Between a Lover and a Friend"'s effect and its MAX bonus, Transcended Storm Bear, Manalandy and Arrow Trigger need to be MAX enhanced.

Effects are active for all Transcended Units during a battle (regardless whether they were needed to obtain the effect), at all times, in all Game Modes.

Accept As Family	Effect	Base	MAX	ULT
	Increases STA	10%	20%	50%

Between a Lover and a Friend	Effect	Base	MAX	ULT
	Decrease received magical damage.	7%	21%	35%

Lover's Rival	Effect	Base	MAX	ULT
	Increases normal attack damage.	20%	60%	100%

Noble Tribe	Effect	Base	MAX	ULT
	Additional Boss Damage.	11%	33%	55%

A Lover Looking For The Truth	Effect	Base	MAX	ULT
	Decreases damage received.	4%	12%	20%

Nearby and Far Away	Effect	Base	MAX	ULT
	Increases magical damage.	8%	26%	44%

Angel's Holiday	Effect	Base	MAX	ULT
	Decreases received physical damage.	7%	21%	35%

Hidden Skill	Effect	Base	MAX	ULT
	Increase Debuff Resistance.	24	72	120

Please give me a bear!	Effect	Base	MAX	ULT
	Increases Defense Penetration.	48	144	240

Bottle of Dignity	Effect	Base	MAX	ULT
	Increases physical damage.	8%	26%	44%

Regular Customer	Effect	Base	MAX	ULT
	Decreases received Critical Damage.	14%	42%	70%

Partner	Effect	Base	MAX	ULT
	Increases main attributes.	4%	12%	20%

5 Great	Effect	Base	MAX	ULT
	Increases ATK Speed.	5%	16%	28%

Advancement of Angel	Effect	Base	MAX	ULT
	Additional Piercing damage.	14%	43%	72%

Completion of Angel	Effect	Base	MAX	ULT
	Increases STA.	12%	36%	60%

Boden Heroes	Effect	Base	MAX	ULT
	Increases Skill Damage.	13%	39%	66%

True Boden	Effect	Base	MAX	ULT
	Increases ATK.	11%	33%	56%

The target is one	Effect	Base	MAX	ULT
	Increases Single Target Damage	13	39	66

Genocide	Effect	Base	MAX	ULT
	Increases AOE Damage	11	33	55