Take any item out of your inventory and hold it.
Facing the entrance to the puzzle; wait until the portal goes to the right passed you. Do this without touching the portal ahead:
W, D, W, Q (throw item)
You will have gone to the tile just before the floor button, faced left and thrown your item across the open pit to fall onto another floor button.
The middle pit is now closed. Walk onto it then over to the activated floor tile.
i need traner whit unlimited health, mana and item use
[Edited by TrueRonin, 4/14/2012 6:30:26 AM]
[Edited by Maint, 4/14/2012 9:14:51 AM]