Killing two creatures is awesome and gives you card advantage, and it's pretty common that you'll run into both flyers and non-flyers as well, not really limiting your options as much as you might think at first
I like the last ability, but if you slap this in the command zone, its for the mana
Most of the cards that make Legacy expensive are the same cards that make Modern expensive: Snapcaster Mage, Liliana of the Veil, Misty Rainforest, etc
Its way better to preemptively Thought Erasure, take their relevant removal, and surveil into your sixth land
Will order more when theyre back in stock
This system is designed to keep the game from having the common problem of power creep in its competitive forms and provide a chance for new players to the game to enjoy it without feeling the need to purchase all previous sets