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Kefkas Tower Bolas's Citadel has a tough mana cost and doesnt do much the turn you play it, but it can offer runaway card advantage

When you do, exile target artifact or creature you control, then return it to the battlefield under its owner's control

While Ghostly Prison is already in Silverquill Influence, a bit more attack deterrence that isnt goad would be good to include, and Sphere of Safety is very good at that

The one part that keeps this card in check is that it only amplifies mana from basic lands, but if youre in a mono-green deck or one thats only two colors, youre still producing tons of mana from your lands.

I think Ive played against it a shockingly low amount of times, far lower than the amount of times Ive died to an Overrun effect