Black Ash (Major)
Activate Cast a Spell
On certain rare occasions, when a particularly despoiled tree or a powerful demonic fungal infestation (such as a Jeharlu Spore) is destroyed, the grimy black ash that remains behind functions as a catalyst called black ash. A Wall of Thorns empowered with this catalyst gains the fungus trait and appears diseased and toxic, with greasy filaments of dripping fungus growing through its vines. A creature damaged by this wall's thorns takes an additional 3d6 persistent poison.
Traits
Items that have the catalyst trait are consumable material spell components that alter or magnify specific spells. Activating a catalyst is part of Casting the Spell. The catalyst might increase the number of actions required to Cast the Spell, as indicated in the catalyst's Activate entry. Additionally, the spell gains the manipulate trait if it didn't already. Because the catalyst becomes part of the spell, you can draw the catalyst as part of Casting the Spell.
An item with this trait can be used only once. Unless stated otherwise, it's destroyed after activation. Consumable items include alchemical items and magical consumables such as scrolls and talismans. When a character creates consumable items, they can make them in batches of four.
Something with the magical trait is imbued with magical energies not tied to a specific tradition of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.