Endbringer An Eldrazi that you have to pay 1 colorless, plus 5 more of any mana, this card untaps during each other player's untap step too
That being said, let's get into the upgrades
Sedgemoor Witch is even better than the Young Pyromancer comparison looks, since both the ward life payment and the Pest token lifegain go a long way to letting you extend the game for lethal burn top decks
Glacial Dragonhunt 0188_MTGTDM_Main: Glacial Dragonhunt A removal spell that doubles as an enabler for your discard theme could be just what you need, as it allows you to disrupt your opponent's game plan and further your own at the same time
Players will want to remain open and flexible with the Emerald and Ruby starter deck, paying close attention to what their opponent is trying to accomplish and disrupting it when they least expect it Strong early-game cards are Aladdin, Prince Ali, Lefou, Captain Hook, and Peter Pan