Synod Sanctum

A flicker effect you build over time and cash in once. Most blink cards in the modern idiom resolve immediately: a creature leaves and returns the same turn, the enters trigger fires, you move on. This stashes permanents indefinitely instead, exiling them one at a time over multiple turns and holding them off the battlefield until you decide to crack the artifact and bring the whole pile back at once. That stored-exile structure is the interesting part. It dodges a board wipe by tucking your best permanents out of the path of destruction, then redeposits them after the dust settles; it protects an enchantment or planeswalker from targeted removal by parking it in the same vault as everything else. The cost is the patience the design demands: each exile is a separate activation at two mana, so building a meaningful cache takes real tempo, and the permanents you tuck away are doing nothing while they wait. The single sacrifice that returns everything is the payoff that justifies the setup, but it also means one creative removal spell on the Sanctum itself can strand your hoard in exile permanently. Mirrodin's artifact set was full of slow, mana-intensive value engines like this, built for a format where artifacts were the dominant axis and a colorless answer to mass removal was worth paying retail for.