mtg black white cards for mana ramp Every Spell ┃ Magic the Gathering ┃ Manfred Plus Magic The 11 Best Ramp Cards
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The reason why Solitude is much better in Modern than in Legacy, where its largely only played in Recruiter of the Guard decks, is that the presence of Daze/Wasteland and the format being faster means its quite difficult to hardcast Solitude

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If you control no other creatures, you'll have to sacrifice Benalish Sleeper

Above is a helpful image of the graph that Wizards of the Coast has on its website showing the ideal mana curve
