Skyline Cascade

A land that enters tapped already costs you a beat of tempo; this one refunds part of that cost by stranding a single opposing creature through its next untap step. The effect reads like a one-shot, stapled-into-the-manabase version of Frost Lynx: not removal, but a freeze that pins a creature offline through the following turn. The trigger is mandatory and fires exactly once, on entry, so the value is front-loaded into the moment you play the land rather than a window you choose later. The whole calculation hinges on that timing: you take the tapped land on a turn you can afford it (an off-curve drop, a turn you were holding up nothing) and spend the disruption on the creature you most want stranded. The rider works cleanest on a creature already tapped: a tapped attacker that would otherwise untap to block or swing again, or something tapped for a cost or an ability. But the effect doesn't require a tapped target; it simply forbids the next untap. Point it at an untapped creature and nothing happens immediately, yet if that creature attacks or taps for anything before its controller's untap step, it stays down anyway. The card prolongs or imposes a locked state rather than answering a threat outright, folding a creature-stalling rider into a colored source that asks nothing of your spell slots and only that single turn of tempo in trade.