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Mesa Enchantress Mesa Enchantress is an excellent source of card draw, even if you're not playing a dedicated enchantments deck

While they read like niche color hate, the absurd efficiency of a one-mana counterspell/one-mana removal split card elevates this to an S+ sideboard card for red decks, and a mirror-beater for any blue deck capable of fetching Volcanic Island which is all of them

Emerging Powers introduces the rare and powerful Legendary Pokemon Cobalion, Virizion, Terrakion, Thundurus, and Tornadus

Going Esper to play cards like Depopulate or Farewell could be a good option, although this likely would be for non-budget builds because playing a three-color mana base is going to cost a lot of wildcards