The Support keyword allows that character to lend their strength to another, increasing your overall damage output for the turn
In the game, you play as your own customizable Hero of Light character that can be any given job, wield any weapon, wear any armor, and more
On the other hand the experiences I remember were that the Sliver decks being 5-color had quite a few mana issues
In fair decks, you get cards and an ally, except for Cut a Deal, which seems the most sketch
Here's a recent 8-1 Challenge winner: Jund Sacrifice Rakdos Cat Oven got two amazing additions from Bloomburrow that transformed the deck into its current Jund form
You can play it in a deck with its partner, which is a black creature (Krav, the Unredeemed) that gives you more of an aristocrats deck configuration