Kuja, Genome Sorcerer / Trance Kuja, Fate Defied Kuja, Genome Sorcerer starts slow by making wizard tokens that deal chip damage whenever you cast noncreature spells, but once you control four wizards (token or otherwise), it transforms into Trance Kuja, Fate Defied, which doubles all damage your wizards deal
At the beginning of your end step, if you control four or more artifacts, return target creature card from your graveyard to your hand
Once this ability gets going the Dragons you create can easily snowball into more Dragons, and from there a victory
Rarity might warp your design, but generally speaking, stick to mythic planeswalkers unless you specifically want your planeswalker at a lower rarity