Aspect of Lamprey

Discard-two effects usually arrive stapled to a body or a spell of their own; here the disruption rides an Aura, which means the two-card strip only fires if you already have a creature worth enchanting on the battlefield. That is the tension the design is built around. The entry trigger reads like a targeted Mind Rot, but the framing changes what you are paying for: you are not casting a discard spell, you are committing an Aura to a creature and collecting the discard as an enters bonus. The lifelink clause is the tax that keeps the package coherent, hedging against pure tempo loss by turning whatever body it lands on into a life engine, which matters most on an evasive attacker or a repeatable damage source. The two effects pull toward different plans (grinding a hand empty versus racing behind a lifelinking threat), and the card asks you to pick a creature that services both. The Aura's vulnerability window is the familiar one: if the opponent kills the target in response to the Aura on the stack, the spell has no legal target and fizzles, so you are down the Aura and nothing has resolved. Once the enters trigger does resolve, the math flips. The discard has already banked, so answering the creature afterward costs you only the lifelink, not the card advantage you came for.