Sporogenic Infection

Two removal spells stapled to one Aura, priced as if it were one. The enter trigger is a straightforward edict, and because the target player picks the sacrifice, they will feed you their least valuable body rather than the one they care about; the real work is done by the clause that walls off the enchanted creature, forcing the sacrifice to come from elsewhere on their side. That fencing converts a soft edict into a genuine two-for-one: it clears a token or a spare blocker on the way in while hanging a death sentence on the creature you actually pointed the Aura at. The standing enchantment then rewrites that creature's combat math entirely. Any damage, from a blocker, a burn spell, a single point of ping, turns lethal, so the enchanted creature can no longer trade or race; a token nibble, a stray point of burn, or an aristocrats-style pinger finishes the job. Aura-based removal has always carried the two-card-disadvantage risk, the creature leaves and the enchantment falls off for nothing, and this design answers that objection by front-loading value on the way in, so the enchantment half reads closer to insurance than to the entire plan. The tradeoff it accepts is the familiar one for Auras that do not destroy outright: the enchanted creature lives until something touches it, so a board with no way to deal that damage leaves the second half sitting inert.