Through physical contact, you possess the ability to discreetly attach an imperceptible explosive device onto individuals and objects, That only you can see. The destructive potential of the device can be precisely calibrated, spanning from the potency of a conventional military hand grenade to that of the formidable GBU-43, colloquially known as the Mother of All Bombs (~11 tons TNT). At your discretion, you retain the capability to adjust the explosive yield at any given moment subsequent to attachment, as well as determine the desired time of detonation.
There is no limit to how many bombs you can attach at a time.