Add tabula rasa

Items/tabula_rasa.txt

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+Tabula Rasa
+-----------
+
+Rarity: Rare
+Aura: Enchantment
+
+A tabula rasa is a stone slab with a smooth face and runes etched around the side.
+Every six seconds staring at the smooth face, make a wisdom save with DC 14 + (consecutive seconds staring)/6.
+If this save is failed, roll on the memory loss table.
+
+D8:
+1 - Forget the past week
+2 - Forget the past month
+3 - Forget the past year
+4 - Forget own identity
+5 - Forget all geographic knowledge
+6 - Forget a random language you speak
+7 - Forget identities of allies
+8 - Full retrograde amnesia
+
+Lost memories can be regained through Greater Restoration.
+
+If a tabula rasa is destroyed, all creatures in a 10 foot radius have the same fake memory (chosen by the DM) implanted.
+
+AC 10 and 15 HP