Siphon

Siphon is a status effect that causes the affected unit to have decreased EP regeneration, while granting the unit that inflicted Drain an equal amount of increased EP regeneration. Siphon does not naturally expire, and only ends if the effect is Cleansed off of the affected unit, or if either the affected unit or the inflicting unit are defeated. The decreased regeneration on the affected unit can (and often will) cause EP regeneration to be negative, which results in a loss of EP (degeneration) at the end of each of the affected unit's party's turns.

If either unit is temporarily removed from the battlefield, such as by Banish, the effects of Drain on both units involved are temporarily disabled, but will continue working as soon as both units are on the battlefield again.

What it Represents
Siphon usually represents a magical or supernatural means of stealing away the energy of an opponent, to be used by the stealer.