Typically, Resonance Crystals display a certain pulsing color depending on their severity level. Any creature that casts a spell within 10 feet of a crystal clump must make an Intelligence saving throw. A creature takes psychic damage on a failed save, or half as much damage on a successful one. A spell or weapon attack that targets the crystals triggers the crystal's effects for all creatures within a 10 foot range of the crystal. The following table is used to determine their damage:

These bright orange crystals give off a distinct glow that looks almost like embers of a fire circling the center of the crystal within. When a creature casts a spell within 30 feet of a Surge Crystal, they must make a Charisma saving throw. On a failed saving throw, the creature is forced to cast the spell one level higher, if there is a higher-level version available, and if the creature has an available spell slot for that spell-level. If no spell-slot is available, the creature casts the spell as they normally would with no additional effects.

Absorption Crystals

These dark-gray crystals seem to distort the light around it. When a creature casts a spell within 30 feet of an absorption crystal, they must make a Wisdom saving throw. On a failure, the crystal absorbs the spell and deposits its energy within. An absorption crystal can only hold a limited amount of spells which is determined the amount of Absorption Points the crystal holds.

The severity level of the crystal cluster determines the potential amount of Absorption Points, and each spell-level corresponds to an equal amount of absorption points. For example, a 1st-level spell would take up 1 absorption point of the crystal while a 3rd-level spell would take up 3. Cantrips are equivalent to a 1st-level spell and count as one absorption point.