mtg cards with hexproof Rules Text: creatures, have, hexproof, 28 Hexproof from Monocolored. And discounted

Id also look at a few other options: Flameshadow Conjuring, Kiki-Jiki, Minion Reflector, Splinter Twin, and Twinflame

The Command Cycle Kayla's Command is a three-cost sorcery with two of four abilitues to make a 2/2 dork, toss a counter onto your creature and it gains double strike for the turn, search for a Plains, or gain two life and scrying 2

2 Develop Your Brain Easily the best draw card in the game, Develop Your Brain lets you look at the top two cards of your deck, putting one into your hand while the other goes to the bottom of your deck

Lethal Scheme isnt the most efficient kill spell, but it does hit planewalkers (big plus for Commander)