Is Klak's Infernal Artifact affected by powers that move monsters?
I found the following entry at the D&amp;D Adventure Systems Wiki:

Attack one adjacent Monster.
If you hit, place that Monster (if it isn't destroyed) on a tile within 1 tile of you, and you can move to any square on your tile.

So you could use Tide of Iron to attack it (since its treated as a monster), but Klak's Artifact states:

Attacking Klak's Artifact will destroy it.

So what happens when something is destroyed?  Page 10 of the rules, under Destroying Objects (empahsis mine at the end):

An Adventure might specify that an object needs to be destroyed to win a particular scenario. If the object has an Armor Class and Hit Points, your Hero can target it just like a Monster.  If your Hero has a power that attacks all Monsters on a specific
tile, it can also attack an object on that tile. Once you deal damage equal to its number of Hit Points, you destroy the object and remove its marker from the tile.

So you can attack Klak's Infernal Artifact with Tide of Iron, but then there's nothing to move afterwards, since attacking the Infernal Artifact destroys it, and destroyed objects are removed from the tile.
Phew.