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Or in the overlap with weird larger mana engines

Hunters Bow is a two mana removal spell that leaves behind some reach and ward

1Trostani, Selesnya's Voice

High Volume Purchases If youre willing and able to buy a lot of booster boxes at once, some stores might work with you a bit on the pricing, lowering the cost per box to you in exchange for getting to extract profit from a lot of boxes right away on their books

It's worth noting that opening one door doesn't close the other - if you play Porcelain Gallery, above, and then unlock Dollmaker's Shop, you don't lose the buff

Kefnet the Mindful If you have enough mana, remember you can spend 9 mana per turn to loop the synergy of Mystic Sanctuary + Kefnet the Mindful + Time Warp to get infinite extra turns