Five Fat Finger Exploding Heart Technique is an ability used by Lefty in Blackrock Depths. As the ability says, after taking five steps and being applied by 5 stacks of the debuffs, you will instantly take 6650 to 7350 damage. The ability is performed with Lefty first preparing himself with an ability called "Initiate Secret Technique". Then, he rapidly applies the "Five Fat Finger Exploding Heart Technique"-buff five times on the target during five seconds.