With The First Chapter, Rise of the Floodborn, Into the Inklands, and Ursula's Return out of the picture, several cards that were staples in the game that didn't receive a reprint are no longer viable unless you're playing in the Infinity format
This hiked the prices of Lord of the Rings Collector Booster boxes until it was found
The problem is that while they usually have high toughness like 1/3, this one is 2/1, making it hard to use defensively
Its a flavorful and devastating payoff for committing to the full color spectrum
You can activate any abilities on cards that are playable in the Main phase
Battles which, at least in their initial incarnation in March of the Machine, are all specified as the Siege type are an entirely new type of card, let alone double faced card