Double-sleeving is a popular practice among players who have high value cards or want to keep their deck in top condition even after heavy use
Having access to lots of cards is key and so is having things to spend your gold on your opponents turn in a variety of situations
Then in your end step exile a random card from all foes, cast it for free, and then they eat damage equal to its cost - amazing free stuff and game winning life loss too
I'll never forget the third turn when the fella across the table summoned that Gray Ogre
Card Rarity Guide Battle System Explained You can craft Pikachu ex (A1 259) by spending 1,250 Pack Points
Isshin's excellent Commander deck is loaded with creatures, enchantments, and even equipment cards with triggered abilities that go off when creatures attack, and with Isshin himself around, those triggers will double