In 3rd and 3.5 editions, the standard psionics system incorporates psionics–magic transparency, which treats psionic energy and magic as mutually and equally vulnerable to a "dispel magic" spell or a "dispel psionics" power; spell resistance protects against powers just as it protects against spells, while power resistance protects against spells as it does against powers. This is primarily done for game balance, as if psionics were not resistible or able to be dispelled in such a fashion psionic characters would be inordinately powerful in a world designed mostly to handle traditional magic (although they in turn would also be especially susceptible to magic). A variant rule, known as "psionics are different," enforces a separation between the two systems; this rule also provides an intermediate step where each system has a diminished effect upon the other (for example, making a dispel check against an opposing energy would take a −4 penalty, and creatures with spell resistance gain power resistance equal to their spell resistance minus 10).