Mandrake was asked by Loremaster Quantum to join him on a scientific mission.
Quantum wanted to compile an illustrated encyclopaedia,
but he thought the task to great for just one man, so he looked for a companion.
Since then, the two of them joined a band of adventurers, recording knowledge along the way.
Mandrake (Thomas) was a very combative wizard,
who had a lot of powerful spells to rain death upon his enemies.
At one time, we met a group of enemies we had a lot of trouble with,
but Mandrake (Thomas) wasn't able to help.
As a target of the enemy wizard(s), he spent the whole fight in magical darkness and/or silence, seeing and hearing nothing at all,
unable to cast spells or see potential targets.
That happened many years ago, and Thomas is still frustrated about that fight.