Crackling Perimeter

A reward designed for a deck that has to want it badly. The Gate matters here as a resource, not a land: every untapped Gate you control is a stored point of damage, but tapping it for this means it is not producing mana that turn. The payoff structure is the whole problem. One Gate per turn drips a single point to each opponent, which is nearly nothing; the card only becomes a clock when you have assembled four, five, six Gates and can fire them in sequence, and assembling that many Gates is itself the cost of admission. That tension forces commitment over splashing: the engine scales with how dedicated your manabase is to a tribe of lands that most decks never touch. It belongs to the handful of designs that treated Gates as a deckbuilding axis rather than incidental fixing, and it is the most direct of them, asking only that you hoard the lands and then spend their tap on reach instead of mana. The activation carries no timing restriction, so the real flexibility is when you fire: hold the Gates up as untapped mana through your opponents' turns, then drain at the end step or in response to whatever they try, converting unspent fixing into damage on the way back to your own turn. A patient, inevitability-style finisher that points entirely at the opponent's life total and waits for the Gate count to make that point lethal.