Combinations of potions are the following:
1. Three in a row - doesn't have any additional effects.
2. Four in a row - creates a linear potion which destroys its row or column.
3. L-shaped combination creates a cross potion which destroys all the potions in its column and row.
4. T-shaped combination creates a bomb potion which destroys all the potions around itself.
5. Five in a row - creates a super potion.
6. A combination of two super potions destroys all the elements on the field.