Pay up 4 again, tap North Star, and then you can convert mana as you please
It can be a tricky graveyard enabler since you can activate it multiple times to set up a big Patriarch's Bidding or find a silver-bullet target to reanimate with Goryo's Vengeance
Abilities that trigger "whenever players finish voting" trigger once all players have voted or once all secret votes are revealed, but they won't go on the stack until the current spell or ability finishes resolving
Of course, killing your opponents weaker minion while maintaining board presence is great
Unearth ( : Return this card from your graveyard to the battlefield
This strikes me as a good inclusion for decks that want medium-sized artifact creatures, and, just like Dollhouse of Horrors, decks that care about Constructs