Adding to the value, of course, is the fact that they are incredibly difficult to pull
While similar to MDFCs, the fact that you can use both sides of the Adventure lands is a big advantage in slower games
A 2/5 vanilla creature for doesnt immediately scream must kill in a Commander pod, but its Runic Armasaurs triggered ability that makes it an incredibly annoying threat on board
Top 10 Rakdos Opponent Draw Triggers Orcish BowmastersOrcish Bowmasters Sheoldred, the ApocalypseSheoldred, the Apocalypse Underworld DreamsUnderworld Dreams Fate UnravelerFate Unraveler Ob Nixilis, the Hate-TwistedOb Nixilis, the Hate-Twisted Spiteful VisionsSpiteful Visions Zurzoth, Chaos RiderZurzoth, Chaos Rider Curse of Fool's WisdomCurse of Fool's Wisdom Dogged DetectiveDogged Detective
14 of the 37 lands enter tapped no matter what, and a few more are conditional on if they enter untapped
players will always have to pay one blue mana, regardless of the converted mana cost of the sacrificed creature