You get card advantage or mana, and eventually the payoff becomes additional burn damage
If you can self-mill most or all of your library, it has the potential to one-shot a player
These feature art that is different from the Secret Lair drop but the cards are mechanically identical and count as the same card as found in the Secret Lair drop when building decksyou can use four in most cases, or just one if you're playing Commander
Whenever a development team works on a base set, they make a wish list of cards they wanted to include but were unable to as the card had the unfortunate problem of not existing yet
Its also important to know that your Explosives interacts with Thalia, Guardian of Thraben favorably
Amusingly, your opponents will probably need a non-creature spell to take it out, so you might get one last draw on the Sentinel's way out