The scry ability is outstanding against people who are slowing you down, and the 5/5 is obviously impressive against people who arent
It has a retreat cost of 2 Colorless Energy
11 Aggravated Assault Aggravating For Your Opponents Aggravated Assault goes from quite bad in normal decks to certifiably broken in decks capable of making large amounts of mana
While I miss making my own sound effects when I send baby dragons into battle, and dabbing hastily at cards Ive spilled cider on in my excitement, Arena builds on the lessons learned by the rest of its genre, and takes away a lot of the friction and fuss that I will (grudgingly) admit exist in its paper incarnation
Without mana acceleration combo decks suffer immensely
If you see multiple good artifacts and enchantments from your opponent, Naturalize becomes a good card (even though you would never maindeck it), and similarly Plummet can do great work against a deck with many flyers