The card's art and ink color are both unique, as all other Elsa cards have been Amethyst so far
Each Elf you control gives Imaryll +1/+1 until end of turn, and it can assign damage to a player rather than the creatures blocking it
Last but not least, there are the most important reprints of the set: allied color fetch lands
When you swung with the first you could stack the triggers so the token churning happened first, and now you had 7 damage swinging on turn five, and 11 on turn six from the Hero of Bladehold alone, without any help
They're just so great, providing two colors, always coming in untapped when you need them, and also having basic land types
A common interaction is to attack for 4 in the hope that your opponent will try to kill it, and you counter their removal to then hit for 6