Steam

Steam is an Elemental Synergy that is activated through the use of Dual Brave Burst. A bond pair with this Elemental Synergy requires one Fire unit and one Water unit.
Steam instantly fills shards of the Synergy Shard gauge. Upon using a DBB with Steam synergy, a cooldown will take effect. During this cooldown, all units with Steam synergy cannot activate their DBB until the cooldown reaches 0. The cooldown count decreases by 1 each turn. Additionally, this cooldown goes in effect at the start of turn 1 of any battle.
The higher the Bond Level, the lower the Synergy Shard cost and cooldown count incurred by Steam and at the start of turn 1 of any battle.
Unlike other Elemental Synergies, DBB with Steam deals significantly less damage in comparison. Steam's damage bonus increases by 25% rather than 50% for each increase in Bond Level (capping at 125% rather than 500% at Bond Level 6), but starts at 0% rather than 200% at Bond Level 1.
Upon clearing a battle wave of a quest, the cooldown resets to the cooldown incurred at the start of battle, regardless of the cooldown count before clearing the battle wave.
DBBEffect_Steam_SeriaKarl.png|Seria and Karl using their DBB, Vanguard of Akras.
==Effect Potencies==
Bond Level	Potency
1 	Instant Synergy Gauge Fill: Fills 5 Synergy Shards Steam Cooldown (upon usage): 9 turns Steam Cooldown (start of battle): 9 turns
2 	Instant Synergy Gauge Fill: Fills 5 Synergy Shards Steam Cooldown (upon usage): 8 turns Steam Cooldown (start of battle): 8 turns
3 	Instant Synergy Gauge Fill: Fills 5 Synergy Shards Steam Cooldown (upon usage): 7 turns Steam Cooldown (start of battle): 7 turns
4 	Instant Synergy Gauge Fill: Fills 5 Synergy Shards Steam Cooldown (upon usage): 7 turns Steam Cooldown (start of battle): 6 turns
5 	Instant Synergy Gauge Fill: Fills 5 Synergy Shards Steam Cooldown (upon usage): 6 turns Steam Cooldown (start of battle): 5 turns
6 	Instant Synergy Gauge Fill: Fills 5 Synergy Shards Steam Cooldown (upon usage): 6 turns Steam Cooldown (start of battle): 4 turns
7~10 	Instant Synergy Gauge Fill: Fills 5 Synergy Shards Steam Cooldown (upon usage): 6 turns Steam Cooldown (start of battle): ? turns
==Shard Costs==
Unlike other Elemental Synergies, units with the Steam synergy require fewer Synergy Shards to use their DBB.
Bond Level	Shard Cost(Steam)	Shard Cost(Other Synergies)
1~3 	2 Synergy Shards 	7 Synergy Shards
4~5 	1 Synergy Shards 	6 Synergy Shards
6~7 	0 Synergy Shards 	5 Synergy Shards
8~9 	0 Synergy Shards 	4 Synergy Shards
10 	0 Synergy Shards 	3 Synergy Shards
==Synergy Progression Requirements==
==List of Units with Elemental Synergy: Steam==
Unit	Partner	Dual Brave Burst
==Changes==
Date 	Description
March 4, 2020(Version 2.11.0)	
*Steam was nerfed.
**Steam now incurs a cooldown based on the cooldown incurred upon usage at the start of each battle.
March 11, 2020 	
*Steam has its cooldown incurred at the start of each battle shortened depending on Bond Level.