This enchantment has many applications, but what you should be excited about are these: Commanders like Kykar, that generate creature tokens from the Command Zone
The specific four color Jace card that will be leading the deck has not currently been previewed
If so, they can pay life and mana to draw cards anytime a friendly Elf dies
This gives you two ways to build the deck, a flavorful Bending Tribal style, or a combo deck that uses an instant like Moonmist to transform Aang immediately and win on the spot
And since it's unlikely that Wizards will ever produce a set exploring this area of design space (although it would be pretty fucking awesome if they did), I decided that I had to do it myself
Unless they're absolutely egregious (like Nadu, Winged Wisdom), cards should no longer go directly from legal to banned, and instead will go from legal to Game Changer