pokemon cards sparking TCG: Scarlet & Violet From nine booster packs to a full Pokémon TCG: Scarlet & Violet

Wound Reflection, Warlock Class, Bloodletter of Aclazotz, and anything worded like this doubles your damage, which is sometimes enough to one-shot players with commanders like Heartless Hidetsugu or Alpharael, Stonechosen

The Grey Havens + Great Hall of the Citadel The Grey Havens is an awesome land to topdeck if you have to topdeck a land, and Great Hall of the Citadel is great early in a legendary creatures deck

I don't know if Elrond is a game changer or breaker but he's got some solid utility that could make him easily at home with many decks that are or splash blue

This is especially the case with Charizard ex decks, which have come back into the meta with the release of Dusknoir in Shrouded Fable