Hundred-Talon Strike
As a standalone combat trick, this is thin: one point of power and a first-strike grant for a single white mana, a rate a hundred other instants beat outright. Its real function lives in the splice cost, which taps an untapped white creature to bolt the +1/+0-and-first-strike rider onto any Arcane spell you were already casting. That tap is the balancing pivot. It asks you to commit a body that could have attacked or held back, so the rider is never free; you spend a creature's potential combat step to upgrade what you are already paying for. The payoff is folding two effects into one card slot: cast an Arcane spell, reveal this, and you get both without spending two cards from hand. Everything resolves together, base text plus rider, so the +1/+0 and first strike are in place well before the combat damage step does its work, letting the boosted creature land its blow before an equal-power blocker or attacker ever connects. It belongs to the family of one-shot tricks built to be glued onto something larger, where the bare line is the floor and the spliced line is the reason to keep it in hand.
