With the aid of a Soulstone, a mage can create an annulity, a realm that blocks magic rather than aiding it. An annullity damps the Tapestry's response to magic of certain Arcana. Used in far-gone times as protections or tests, an annulity weakens any spells that utilize the inferior Arcanum from its Realm, much as may occur when a Paradox causes an Anomaly. This does mean that Masters of certain Arcana are less susceptible to these effects than others — only Forces (Arcadia), Matter (Pandemonium), Spirit (Stygia), Mind (Primal Wild) and Death (Aether) can be suppressed by an annullity. This has led, by those who study and ponder such things, to some who consider the inequality proof that other Watchtowers exist.