If youre excited to try this out for yourself, Kaldheim is coming to MTG Arena (which can soon be found on Android phones as well as PC) on January 28th, followed by its tabletop release date on February 5th
I don't think MTG ever had 'proper' troll tribal mechanics, did they
His finest work so far was when he exterminated an entire survivor group, one at a time, and placed the balloon-head of each previous victim in a choice location where the dwindling survivor group would be sure to stumble upon it, thus heightening the survivors' anticipation of their own upcoming deaths
No one will ever pay full retail mana cost for this metal menace (though it doesnt HAVE Menace, dont get confused!) Instead, Krang makes for a valuable top end to come down fast for artifact decks looking to stack damage
Its cheap, efficient, and very effective
To me, the ability to sneak a permanent into play had far more value than reducing the cost of dragons by a single generic mana