As mentioned, white has a lot of its life gain tied to Angels, but white-black can actually give you three other possible creatures to tie into your theme: Vampires, Clerics, or Bats
This is the more expensive version than the cheaper Hidden Fates Premium Powers collection
Even with the combo potential in mind, the Nightmare Creature can get out of hand if your graveyard is big enough
When everyone is trying to go big, you should start playing cards like Gonti, Lord of Luxury to punish them
Maybe a Beetleback Chieftain for a bunch of tokens, perhaps
If that higher rated player beats you, the point deduction that you will receive is not that drastic, and the addition that he/she will receive in his/her rating is also minimal