Atlani Swiftblade

Atlani Swiftblade is a planeswalker from pre-time travel Tarkir. She is accompanied by her sentient blade, named Selem. Atlani has no spark of her own, and planeswalks using Selem's spark.

Early Life
Atlani grew up as a warrior among the Mardu Horde, earning the title Swiftblade after striking down eight enemies in three minutes during a Temur raid. After a fight against the Jeskai, she became interested in the idea of fighting without weapons, and spent three years training at the Dirgur Stronghold before returning to Mardu territory.

Five Years Gone
After gaining the ability to planeswalk, Atlani spent a period of five years travelling to various planes, including Amonkhet. She spent this time hunting monsters, learning new techniques, and generally growing stronger.

Lettie and Zero
Near the beginning of winter, Atlani was approached by Lettie about hunting down a drone. Taking on the job, she quickly found a smaller one than anticipated, followed by Atlani being found by Experiment 4, who attacked her for keeping the drone. Four successfully managed to hide from Atlani, who left while she could, delivering the messenger drone to Lettie (who gave it to Neeyo) before returning, and finding Zero instead of Four. (current interaction is Zero and Atlani meeting with Neeyo)

Telepaths
Atlani was hired by some thug to "deal with" Allatu Kishar, who Atlani had no intention of killing, but decided to spar with. Allatu revealed to Atlani that dragons had been seen on Tarkir, Atlani fled to her home plane, finding it in its new timeline, where she learned of the Dragonlords and a little bit of what the Mardu had become.

After returning to the Arena, Atlani met with Anne, a strange ant-turned-humanoid planeswalker, and helped her reunite with her sister Bea.

A Cold Winter
After losing in her bout with Four and nearly losing her sparring match with Arcanis, Selem quickly decided that Atlani was no longer useful to him, and he left. This left her weak and unable to planeswalk. Shortly after, she met Bernadette, a planeswalking shadow, and they bonded over having lost so much.