Outpost Siege

I do like the "choose Khans or Dragons" template in the cycle which Outpost Siege belongs to. In this specific case, it's probably just as well that it uses it, since you may not always be able to exploit both of them in the same deck - the first option probably helps any red deck (seriously, I look at it as sort of the red Phyrexian Arena), but only one damage per creature leaving play really wants some kind of vast Goblin and/or token horde, and many decks don't have that. I suppose you could cast multiples of the Siege in sequence if you really wanted to use both, but no matter what you decide to do, there's a lot to like about a card that invites you to build around it in not one but two ways.

Constructed: 3/5
Casual: 4/5
Limited: 3/5
Multiplayer: 3/5

Today's card of the day is Outpost Siege which is a four mana Red enchantment which has a choice of two effects when played.  The first allows you to exile the top card of your library at the beginning of your upkeep then until end of turn you can play it. This is a a sort of one-sided Howling Mine that can shore up Red's tendency to run out of steam in the middle to late stages of a game, particularly mono-Red burn.  The second choice deals one damage to target creature or player whenever a creature you control leaves the battlefield.  This is better suited to swarm builds like goblins or Boros or a sacrifice engine for a more controlled burn or removal. Overall this is a versatile card for Red that can work in many popular designs, though the slightly high mana cost will likely keep it from seeing a great deal of play competitively.
 
In Limited this is a strong first pick in Booster that primarily would be used for the card advantage as the second effect is less efficient when swarming is unlikely to be available.  For Sealed the single Red in the mana cost and card advantage offered add quite a bit of value to the Red pool and it should be played whenever viable.
 
Constructed: 3.5
Casual: 3.5
Limited: 4.0
Multiplayer: 3.5