Wild Edge Serge

60% boost to Atk, 30% boost to max HP, considerably boosts critical damage & hugely boosts BC, HC drop rates

Boosts critical damage & 30% boost to Spark damage

BB

Demise

2 DC15

12 combo powerful Earth attack on single foe, enormously boosts own BB gauge for 3 turns, hugely boosts BC efficacy for 3 turns, enormously boosts critical hit rate for 3 turns & boosts Atk, Def of Earth types for 3 turns

SBB

Conclusion

2 DC26

16 combo powerful Earth attack on single foe (consecutive uses boost damage), fills own BB gauge to max, boosts own Atk, Def for 3 turns, enormously boosts own critical hit rate for 3 turns, & boosts critical damage for 3 turns

UBB

Raven Specter

1 DC30

20 combo massive Earth attack on all foes, enormously boosts Atk and critical damage for 3 turns, adds probable powerful Spark critical for 3 turns & enormously boosts BB gauge for 3 turns