Missionary (Age of Empires II)

The Missionary in Age of Empires II is a Spanish unique unit, only in the conquerors expansion. It is capable of healing units, as well as converting enemy units, but can not pick up relics. It can move quite fast, capable of keeping up with cavalry units. Including several of these in a force of knights can considerably improve your chances in a drawn-out battle. They also work well for converting the surviving villagers, buildings and units of a defeated enemy. They only have 7 range, as opposed to 9 for a regular monk.

Missionaries cost 100 Gold to train.