Teferi's Response

A counterspell with its trigger condition baked into legality itself: it cannot be cast unless an opponent is, right now, pointing a spell or ability at a land you control. That single constraint is what pays for everything stacked on top. Inside that narrow window the card does three jobs at once: it counters the offending effect, it destroys the source permanent if what it countered was a permanent's ability, and it refills your hand by two. The ability clause is wider than land-destruction activations alone; a triggered ability that targets your land, an Acidic Slime's enters-the-battlefield effect aimed at your manabase, gets countered too, and the permanent that spawned it gets blown up in the bargain. That destruction rider is the part that converts a defensive parry into a tempo swing, punishing the source and not just the targeting. The card-draw clause does not rescue a stranded copy (without a valid target you cannot cast it at all), so it is not insurance against dead draws; it is a reward for being right about your opponent. That distinction is the whole design logic. Most narrow hate effects ask you to spend a card and gain only the removal; this one over-pays the moment its condition is met, so defending your mana base also advances your game. It dates from a time when attacking an opponent's lands was a real plan, and answers to that plan needed to be worth holding mana open for.