Well, I could always post a Leviathan - oh. Well, they COULD crawl on land. Not cool? Oh, damn.
Well, what about the Unfrozen? Tribe of stone-age people freed from a glazier, complete with a mage? Oh, right, ice doesn't count as ground.
So, what about a Tupilak? They are nice, Late Age Atlantis national things. DDDW, it creates a Tupilak from parts of various animals, and the creature is then able to change forms between them. The most common recipe has seal, raven and reindeer for mobility, and bear for fighting capabilities. Oh... sorry, I forgot it isn't a summon. Nor recruitable; that one pic Kristoffer posted long ago, the one which has an Atlantian riding something that looks like an undead bear, must be a hero or something.
Hey, I know! What about a poison golem! Construction 9, DDDDEE, 35 gems. You should know the icons, they've all been used in Dom2 already (both resistances are immunities, of course, this being a golem. Banefire Shield is only strength 5, though.