Dungeons & Dragons: Chronicles of Mystara

This requires using any ability that "summons" something, like the efreet bottle or the conjure elemental spell. The easiest way to get this one is to use the magic user. He gets three castings of conjure elemental right from the start. So just use the summon three times, let him die and continue with him again and his spells are refreshed. Rinse and repeat till you get them all.