Sanctum of Fruitful Harvest

The green node in a five-card cycle built on a snowballing premise: each Shrine you control makes every other Shrine better, so five mediocre pieces become one accelerating machine as you assemble them rather than any single card carrying the deck. This one is the ramp engine, and it fires at the cleanest possible window. The mana arrives at the beginning of your first main phase, before you have committed to a play, and it can be any one color, which lets a mono-green board fund off-color spells or fix a splash without touching the manabase. Because the trigger reads the Shrine count fresh each turn, the output grows as you deploy the rest of the cycle, and the mana it produces can be spent casting the next Shrine, which then raises the count for every trigger after it. The tension the whole cycle resolves is that a single legendary enchantment producing mana off itself would be a slow, unexciting card; tying the count to a shared type is what turns collection into acceleration, with the harvest one existing to feed the others. Nothing here demands a build-around beyond gathering the set, and that restraint is deliberate: the reward is legibility, a payoff a player can see coming turns in advance and steer toward.