Lingering

A lingering effect is one that persists even after a card has left play. Because tokens are not Effect Monsters (but neither are they Normal Monsters!), they do not have any effects of their own; rather, the "effect" of a token is actually the lingering effect of the Spell, Trap or Monster effect which created it.

These effects, however, are listed as the "effect" of the token, along with the only way it can be Summoned, to make its purpose less confusing.