Wail of the Nim

Entwine's whole pitch is that you should never have to pick a mode you only half want, and this card is a clean test of that promise because its two halves point in genuinely opposite directions. One mode keeps your board alive; the other tries to kill everything small, your own creatures included. Choosing one is a real fork: regenerate to weather a sweeper, or fire the pinger and let the symmetric life-loss serve as reach. Pay the entwine and the tension dissolves into a one-sided sweep of the small stuff. Regeneration shields go up first, the damage clears the opposing side's 1-toughness creatures, and your own creatures shrug off the point they would otherwise take. That sequencing is the entire reason to want both clauses at once, and it is exactly the two-for-one entwine was built to enable: the mechanic lets the damage mode and the defensive mode coexist, then asks a small extra payment to refuse the choice entirely. The flavor leans the same way. The Nim are Mirrodin's swamp-dwelling undead, and a wail that simultaneously raises and ravages reads as their signature: the regeneration as the undead refusing to stay down, the damage as the rot they carry with them. As a piece of black instant-speed design, it shows how a single card can hold a defensive answer and an offensive one in the same slot, with the entwine cost as the toll for collapsing the fork.