If you want to search for ultimate gem gods monsters, you can search for ultimate gem gods with cards such as Bystead Magnaut or Dragon Melody of Awareness
It is very rare for new players to win with their first deck, no matter if its pre-made or a customized one
Wild Picking and Number 26: Spaceway Octobypass will have your opponent's thinking twice before attacking you
Ratatoskrs replacement in the MTG canon is literally unkillable save for the occasional Toxic Deluge or Swords to Plowshares, but even then, why would your opponents want to waste their removal on a measly 1/1
Goldmeadow Harrier would appear in the very next set, Lorwyn
MTG has many ways to donate or make your opponents take control of your cards, and sometimes, your whole deck revolves around your opening to give them a lose condition