Increasing hints:
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× As you see, you need the sword to kill the adder, but only have 2 hits avaible, which means that you must enter the brain room when the adder is way more shortened. How can you do that?
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× An adder shrinks when he is in a dead end AND one of the three edges (adiacent to the dead end) is a part of his body.
If you need more, you can also look in the mechanics of monster movement pattern in the get help pages.
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× But, since the adder is brained, you'll need the obstacles to help you do that.
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There's not some other world out there where everything's gonna be okay.
There's just this one, just this rock.
-33th Skywatcher
