Much like Humility This card slows the game down to a crawl, disabling everyone's creatures and shutting down a card type that everybody has likely built their deck around
Each set will have three new promo cards with slightly different foil patterns compared to the booster pack versions, and collectors will have ways to get all three promos at the same convention
Yasharn, Implacable Earth Yasharn, Implacable Earth is particularly good these days when Wizards of the Coast (WotC) has unleashed the Treasure floodgates and nearly every deck has some busted card that makes a bunch of Treasures
The best part of them though, is that your Creature spells cost one generic mana less to cast for each point of life your opponents have lost this turn
I believe the restriction of only getting to use instants or sorceries of 3 mana value or less is a good restriction and plays on the youth in which Aang flees
The exception is if youre doing something to blink Aethertide Whale to run an energy combo with a select subset of cards