mtg doctor who collector booster box What's In a Booster? facing alien threats Allons-y! On October 13, Celebrate

Note we're looking for the word destroy today, so no exile/sacrifice effects like Realm Razer or Cataclysm

One of the reasons this card was banned was that the synergies with Manifold Mouse were too strong: They allow you to target your Heartfire Hero for free to trigger valiant and give it a +1/+1 counter, while you also give the Hero double strike for a turn

While it wont prevent your opponents sorcery-speed removal, this card will do great work allowing you to set up your board without fear of your pieces being picked apart as you go

But not my top five

You can get it multiple times through Tsunomon ST21-01's On Deletion effect