The Calamities are a set of Events created by my dad (with a little of my help) as a gag gift for a friend who, when he plays Dominion with us, likes to end the game early whether he's ahead or not (more often he isn't). So all of these events (except the Tornado probably) make the game end sooner, and this stack is kind of an RBCI, but may be fun to play with a few tweaks...
The Calamities are a pile of Events that are each removed from the game after they're bought.
from top to bottom:
Landslide
$3 - Event
Each player trashes two cards from their hand.
Remove this from the game.
Tornado
$3 - Event
+2 VP.
Each player trashes the top 2 cards of their deck.
Remove this from the game.
Hurricane
$3 - Event
+2 VP.
Each player (including you) gains a Curse.
Trash all remaining Curses from the supply and remove this from the game.
Wildfire
$5 - Event
+2 VP.
Trash one card from each supply pile costing up to $4.
Remove this from the game.
Earthquake
$8 - Event
+2 VP.
Trash a card from each supply pile.
Remove this from the game.
Tsunami
$16 - Event
+2 VP.
End the game.
Originally, the costs were higher on the first few Calamities, and they didn't have the VP. I said there should be some incentive to buying them if you want them to be playable. So he added +2 VP on all except the first (because the first is already helpful), and lowered the cost on most of them. Personally, I still think the first three are the only ones likely to get bought.