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I just got the Cerebus figurine for my archer. Pretty good! I've heard there are others in the game. Everyone gets the spider, but he kind of sucks. I heard there was a lion, an efreeti bottle, and maybe some others. Anyone know what they are and how you get them? I'm assuming many of them come from "Keep" quests.

A you already said "spoiler", I'm not gonna say it again.

The Efreeti Bottle can be pickpocketed from the Djinn who stands guard outside the tent in Trademeet.
The Silver Horn of Valhalla can be looted from a house in the Bridge District (watch out for traps) and then upgraded twice by the Rashemaar weapons dealer on the wooden platform in Waukeen's Promenade.
The Golden Lion Figurine is a reward from the Druid's stronghold quest.
In ToB you get the Golem Manual, which can be found in Watcher's Keep, and upgraded by Cespenar.

Can't remember off the top of my head right now if there are others.

Minor Spoiler: if you accept Bodhi's offer, on your final mission you'll obtain the Ring of Djinn Summoning from the body of Aran Linvale.

-- Nifft