Actually LittleBobbyTables, Klak's artifact has 5 hitpoints, so attacking it with Tied of Iron may well not be enough to destroy it, in which case I reckon it would knock it to another tile.
In fact, my kids were playing and this ended up being the exact situation. The Ranger had just reached 0 hps leaving only the Fighter and Klak's artifact- it needed to be destroyed this very turn or else it'd come back to the Ranger's turn and they'd lose (no more Surges left). Problem: the artifact had 3 hps left.
The Fighter hit it with Tide of Iron. Result: 1 point damage and knockback to an adjacent tile. He chose a tile that had a Dart Trap on it. In my role as DM, I decided that anything entering that tile would trigger the trap (hell, I figure if you, as a character, threw something big at a trap you'd set it off). The trap hit, did 2 more points of damage: artifact shatters into a zillion pieces, and the Fighter drags the Ranger back to the surface to be healed.
Now, hey, some people may say "Nah, Monsters don't set off traps" or quibble; but to me, it was a brilliant idea to blow it back into that space. A heroic idea. An mad adventuring idea. And so the story of that (which to me is the whole point of games) won out- a last second win due to a tricky move...