Hollow Trees

Banking mana instead of spending it is the whole proposition here, built around a single recurring decision: leave this source tapped through your untap step and you forgo the turn's green to add a storage counter, and a counter banked is mana you can release all at once later. That reframes an accelerant as a slow-burn accumulator, trading immediacy for a delayed burst that ignores the usual one-source-one-mana ceiling. The cost is steep on every axis: it enters tapped, each counter spends a full turn of actual mana production, and the only way to cash out is to tap the land, so the payoff is one explosive turn rather than sustained acceleration. The whole storage-land cycle reads as an early attempt to attach a real decision to a land, an answer to the question of what a permanent does on the turns you are not spending its mana. Most of these designs asked too much for too little and faded, but the core idea (a permanent that hoards a resource across turns and discharges it in a lump) kept resurfacing in later vault-and-battery designs. The patience is the whole pitch: the land itself is colorless, it produces green, and it asks for turns now in exchange for a flood of mana on the turn that finally matters.