The amazing 2e said power
Disintegrate
Power Score: Wis -4
Initial Cost: 40
Maintenance Cost: na
Range: 50 yards
Preparation Time: 0
Area of Effect: one item, 8 cu. ft.
Prerequisites: telekinesis, soften
The disintegrate science reduces an item or creature to microscopic pieces and scatters them. Anything is vulnerable unless it is protected by magical shielding such as a minor or regular globe of invulnerability or by an inertial barrier. The psionicist chooses his target, but he can disintegrate no more than 8 cubic feet of material with one use of this power.
If the target is an inanimate object, it must save vs. disintegration; success means it is unaffected. If the target is a living creature, character, or an undead creature with free will, it must make a saving throw vs. death magic. If it succeeds, the creature feels only a slight tingle, but is otherwise unaffected. If the save fails, the creature is disintegrated (or 8 cubic feet right out of its center, which should be enough to kill most anything).
Power Score - The power affects 16 cubic feet and saves are made with a -5
penalty.
20 - The power backfires and it affects the initiator (save with +5 bonus).