For the item used to unlock the Watchtower teleport spell, see Spell scroll.
The main RuneScape Wiki has an article on: Magic scroll
The Old School RuneScape Wiki also has an article on Magic scroll.

The Magic scroll is an item received after completing the Plague City quest.

By selecting the item's "read" option, the player will unlock the ability to cast Ardougne teleport. The player does not need any Magic level to read the scroll, but casting the spell requires level 51 Magic.

Multiple copies of the scroll may be obtained by using the drop trick; however, reading multiple scrolls has no further effect. If the player loses the scroll, they can obtain another by talking to Edmond.

Transcript

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