mtg cards with lifelink Spirit Link (9ED-47☆) - Ninth Edition Foil Lifelink | MagicArena Wiki |

He draws you cards whenever your attacking creatures die and burns your opponents for one if the creatures die outside of the attack step

You could put it in a fat pack box, tape that up with another packing slip or copy of the shipping label attached, then put that inside a small reused amazon/ebay box with some reused packing material (you probably have some lying around)

Its still a great protection spell at highly interactive tables and sees cEDH play for that purpose

Read more _slaypl took down C'mon

Ending the turn after the spell keeps pesky dies triggers from happening and hitting artifacts in addition to creatures is a clean answer for Cori-Steel Cutter