SURE !!!
When i heard that name in the spells of BG2, i thought that the name ringed a bell, probably from BG1, but couldnt remember who he was. Now that ive read your posts, Im pretty sure that its him. And yeah, its a damn hard battle (and you get too few xp).
SPOILER
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For those who dont know, by reading a tomb in Nashkell graveyard (cant remember which one, its one near the south-eastern part of it), a mage (DaerŽRagh) appears. If you do it three times, youŽll have a tough battle
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You up ?? Beware !! When falling, better fall from down