First, some terminology, so we're all talking about the same thing:
mimic: blue guy that you can move around, doesn't attract monsters; from blue potion
decoy: colorless guy that stays put and attracts monsters; from orange potion
goblin: green monster, can move around some obstacles (in NE part of this room and in S part of this room)
golem: orange monster, doesn't move around obstacles (in NW part of this room)
In this room, your challenge is to move the mimic from the goblin in the south to the golem in the northwest part of the room. To make the mimic progress, you need to push it against various obstacles. These can be pit edges, decoys, decoy swords, or even monsters.
In the NE part of the room, the goblin is obstacle you push the mimic against.
Click here to view the secret text
×But that goblin will only stand in the right place for one turn.
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×Notice that the goblin is released when Beethro steps from the sand to the grass in his section of the room. Be careful to release the goblin at the right time. Please see my previous hint for more info about this.