Guardian Naga // Banishing Coils

The damage-prevention rider inverts what a 5/6 vigilant blocker usually promises. Vigilance already lets a creature swing and hold the fort, but the prevention narrows precisely to your own turn: during your combat step nothing gets through, while on the crackback Guardian Naga is a plain 5/6 that trades and dies like anything else. That asymmetry rewards attacking into a stalled board, not turtling behind it. It hits with impunity and defends like a mortal, so the card wants to be the aggressor. The Adventure half, Banishing Coils, is a disenchant that exiles rather than destroys, and the gap between those verbs does the real work: it answers recursion and reanimation permanently, taking out the artifact or enchantment that would otherwise shrug off a destroy effect and rebuild from the graveyard. At it costs a mana over the plain destroy-effect school, and exile is what the extra pip buys: a solution that outlasts a yard instead of feeding it. What binds the halves is sequencing, not a discount. You spend to answer a threat now, then several turns later untap and pay the full for the body waiting in exile, all off one card. The creature is not cheapened; it is deferred, buying tempo with an early answer and collecting the durable attacker once the board has settled.