Game mechanics-wise, its a card with 7000 Power that allows you to drop the Power of two of your opponents Characters down by 3000 points on the turn you play it
Elspeth, Knight-Errant You might not think it as much now, but once upon a time Elspeth, Knight-Errant was one of the gold standards for planeswalkers
Ignore questing or challenge, their ability to ready still leaves singing and using abilities
Glory and Brave the Elements are similar tricks that used to see a lot of play, and still do, within certain decks
Double damage can lead to explosive plays, and getting around damage prevention is a nice bonus
This card would be beneficial in a Gruul Aggro deck that focuses on fast and aggressive gameplay, utilizing red and green mana efficiently