Ziatora, the Incinerator is a 6/6 flier for six that allows you to sacrifice a creature to deal damage equal to that creatures power to anything on top of making three Treasure tokens at each of your end steps
Nekusar isn't very effective in combat, but it can grind down the opponents' life totals without having to attack
You can get random cards in Booster Packs or buy premade Starter Decks
Black Market Connections is a versatile enchantment that acts as a source of mana, card draw and changeling creatures, granting you as many of these options each pre-combat main phase as you like in exchange for some life
It was a close call, but ultimately I chose Overview of Danitha, New Benalias Light Danitha, New Benalias Lights ability lets us cast one Equipment or Aura from the graveyard on each of our turns, thereby looping in two other synergies: graveyard and Auras
Let us know which one below in the comments and what upgrades youre on the hunt for