Leona

80% boost to Atk, Def, 50% boost to max HP, probable normal attack on all foes & boosts BB and SBB activation rates

Greatly boosts Atk, Def, Rec relative to how low HP is & Spark damage enormously boosts BB gauge

BB

DM: V-Slasher I

15 DC28

Powerful Earth attack on all foes, greatly boosts Def relative to Atk for 3 turns & adds additional powerful attack at turn's end for 3 turns

SBB

DM: V-Slasher II

10 DC30

Powerful Earth attack on all foes (damage relative to remaining HP), powerful Earth attack on single foe, hugely boosts Atk relative to Def for 3 turns, adds additional powerful attack at turn's end for 3 turns & hugely boosts own Atk and reduces own Def, Rec for 3 turns

UBB

DM: V-Slasher MAX

15 DC33

Massive Earth attack on all foes (damage relative to remaining HP), massive Earth attack on single foe, enormously boosts Atk, Def, Rec for 3 turns, enormously boosts critical hit damage & enormous 3 turn Atk, Def reduction