This Aurora has a decent Strength of three and high Willpower of five, making it a desirable card
The other is if a player runs out of cards in their deck
This five-mana red and white planeswalker comes in with four loyalty, can create 3/2 spirit tokens, allows you to Discover with a value of four - which means you can cast the next nonland card in your library with a mana value of four or less for free - and lets you exile cards from your graveyard to gain mana, then cast those cards if you want to
Since token decks have the potential to go very wide, doubling the number of tokens you control is amazingly useful
The only downside is that if/when your mana dork gets removed, you also stand to lose your biggest attacker
owyn, Shieldmaiden owyn, Shieldmaiden hits incredibly hard and looks stylish while doing it