You can tame a Nordic catoblepas at Catoblepas Valley which requires a lot of resources for this mid-level beast. However, you can also tame one for 3 troll claws and 3 bear meat at Maliken Pen after the quest A whip for legends. It is a one time only tame that takes 2:18:53 and is a great way to get a mid-level pet. You do have to have 00291 10 Tanning as well as access to Library in ruins and ability to survive in there for a couple of squares.
Nordic catoblepas stats
Nordic catoblepas-0
Catotaming hardway

You can also hunt Nordic catoblepas at Catoblepas Valley with 00070 45 Hunting

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