Left-Handed Magic Creatures
I referred to Daxos of Meletis as a southpaw recently because his sword’s sheath rests on his right hip, meaning he would draw his weapon with his left hand. Here are more M:tG creatures who, based on the art, are left-handed (like me):
Avacyn, Angel of Hope
Serra Angel (the original art by Douglas Shuler depicts her as a lefty.)
Battlewise Hoplite (while he is holding his spear and shield like a righty, his magic emanates from his left hand.