Metamorphose: thanx but i dont want temporarely, i want permanent summonened creatures (sorry my english is bad) like the skelettons in diablo 2 or the creatures in geneforge. did you know more games like that?
i want a permanent creature: i summon it once and she left only when she dies, not the time runs out like temporarely summons
TwoHandedSword: As Titanium says, go with
Master of Magic. Conquering the world with summoned creatures is a valid play style; each school of magic has its own summoning spells; and one of the perks of certain Death creatures is the ability to raise killed enemy units in your name. There are even available wizard skills such as Conjurer (makes summoning spells cheaper) and Channeler (reduces spell maintenance costs).
Don't you also summon your Heroes in MoM? I seem to recall summoning Heroes and then having them run around the land :D