Having killed the troll and gone for a walk along the clifftop, we encounter a stream.
Rather than simply cross it, Tarldren decides to part it's waters with magic.
Noticing that there's quite a lot of energy in it, he attempts to absorb this and convert it to mana.
This works very well- rather too well infact, and he soon realises he can't switch off the power.
It needs to go somewhere, so he casts a spell to summon a water elemental.
The strength of the spell is so immense that the elemental summoned is a 100 feet tall raging whirlpool of the river-water.
The others scatter, having the sense to not stand under such a creature.
TBC