Pick up the teleporter stone (drag and drop into inventory) and keep it for now, or leave it there until you get the other one. You need to get into Mardaneus' house to free Lanilor...
The portal stone there is a one-way trip; there are some pairs of portal stones that you can teleport back and forth between. They are a similar concept, but separate from the telepoter stones.
8+10 = 8 + (zero to 10) = 8 to 18 damage.
See
differences between classes (minor spoilers)
or the bottom of
Early Starter Tips (NON-Spoiler Version) for most of the same information
Talk to Lanilor, he should give you a hint to get into the house....
There are keys or levers for most quest related doors/chests, though Lockpick does come in handy.
