Four is about the going rate for strong self-mill right now
It does mean that you cant simply play reactive and expect to stumble to victory
Any card that targets a creature and has a cantrip effect also becomes a mass card draw spell: cast a one mana Crimson Wisps or Expedite targeting Zada, and you'll draw a card for each creature you control
There are still small piles of SP copies on SCG and TCG at the time of this write up, and those seem like a good place to go deep
Unlike its predecessors, though, Fifth Edition also removed many cards that Magic's Design and Development team saw as just a little bit too good, but not quite so powerful as to heavily disrupt tournaments, including Savannah Lions, Serra Angel, Hypnotic Specter, Sengir Vampire, Lightning Bolt, and Swords to Plowshares
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