Curator's Ward

Most protective Auras carry a hidden two-for-one: if the enchanted creature dies to instant-speed removal, you lose both the creature and the Aura at once. This one builds the insurance directly into the contract. Hexproof stops the targeted removal that usually punishes Aura players, and the leaves-the-battlefield clause covers the failure case the keyword cannot: a board wipe, an edict, a sacrifice effect that ignores hexproof entirely. If the protected permanent leaves the battlefield anyway, and it qualifies as historic (an artifact, a legend, or a Saga), you replace the Aura and then some. The design reads less as a buff and more as a wager on a high-value target. Stapling card draw to a permanent's death turns the opponent's removal decision into a tax: leave the legendary creature alone and let it run, or kill it and hand over two cards. That tension is the whole point, and it scales with the importance of what you enchant, which is why the historic clause exists as a gate rather than a blanket. On a vanilla creature it is a plain hexproof Aura. On a commander, a key artifact engine, or a marquee legend, it asks the opponent to lose the exchange no matter which way they answer.