An imbued wood focus is a rod, staff, or wand cut from a tree infused with extraplanar energy. If you're a spellcaster, you can use this item as a spellcasting focus.
When you cast a damage-dealing spell using this item as your spellcasting focus, you gain a +1 bonus to one psychic damage roll of the spell.
An Arcane Focus takes a specific form and is bejeweled or carved to channel arcane magic. A Sorcerer, Warlock, or Wizard can use such an item as a Spellcasting Focus.