Larian Studios Forums Divine Divinity (English) Help/Tips/Tricks *spoiler* Iona Dungeon, can't get out :(

There is an easy way to duplicate stackable items (the 2 shadow potions);
Drag a stack out of (or into) your inventory (or container) and hold down the control key before dropping. This will bring up the split stack pane; type in a negative number and hit enter (the checkmark will be greyed out). This can also be done in the trade window.