Its the Elementals ability to return to the battlefield from exile that makes it really interesting, though
As long as you're in a format where you can play Fetchlands to fuel your graveyard, it's essentially an upgraded Llanowar Elves that can heal you and damage your opponents without having to go through their creatures
Coram, the Undertaker Coram, the Undertaker turns mill into card advantage and even theft
While, yes, Dictate may be one more mana than the Furnace, it seems well worth it to flash it in during someone elses combat step, killing off an unsuspecting opponent
Tchotchke Elemental gets +1/+1 for each knickknack counter on it
It's pretty fun and clear to see your card as you design it with drop downs, searchable cards and other treatment elements