Sheltered By Ghosts is a card that will be in the 75 of every white creature deck next year: if you can guarantee it resolves (with ward creatures or Shardmages Rescue), then it should be a 4-of in the main
With ways to keep ourselves safe and deter our opponents from just killing us while only running small pinging creatures, we need a way to win the game
However, booster packs are cheaper and can still contain rare cards
It works best in Commander with commanders that care about legendary status like Kethis, the Hidden Hand and Captain Sisay, since it offers a tutorable land in the latter case or fodder in the former
Once you have a solid foundation, there are two more ways to improve your collection: 1
If you are the one attacking, then keep track of how much HP your opponent still has