Potentially yeah. Would need to tweak the land base a bit, but having repeatable removal and more mana could be handy. Also gets found with Board the Weatherlight now that 'walkers are legendary!
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Swapping the RIPs for 2 Thoughtseize sounds good. Maybe relic/nihil in the SB for yardhate that doesnt turn off visions/crypt? is MB ghost quarter a bit risky with a 3 colour manabase?