You can read all about it here, but the TL;DR is that I made this deck for my oldest son (9) for him to learn the game
Seven mana isnt something you can just put in your average deck and expect to happen though, but if your deck is slow or has some acceleration, Coliseum Behemoth should be fine to play
Promising the gift for an instant or sorcery spell works just like it does for a permanent spell
Emet-Selch's last ability checks your graveyard at the moment it would trigger to see if you have fourteen or more cards in your graveyard
Sure, your opponent gains life, but isn't that a small price to pay considering you're only putting in a one-mana investment
The Equip cost is high at four mana, however, so youll need a way to discount that to make the most of it