Edge of Eternities mainly focuses on one star system, Sothera
Card advantage is something that's always appreciated in red, and the Dracosaur draws you an additional two cards every turn while also providing additional creatures and mana
What may not be clearly understood is that anytime an opponent gets damaged by the creature, you draw a card in Magic: The Gathering
Outside of those specific decks, Murder is always going to be the best choice for slaying others because its an instant and has no targeting restrictions
It can sweep up multiple artifacts and enchantments, but at a base level it clears all the pesky 0-mana artifact tokens from play for no extra investment
If you've already got a lot of cards from The First Chapter, apart from the guaranteed foils in the 2 decks, it might be more cost-effective to put your money towards boosters, unless you're looking to pick up the cards from either of the starter sets quickly, then the fixed nature of the decks will get you those quicker than randomized boosters