They still have to follow your commanders color identity, of course, just like the rest of the 99
Etali, Primal Storm Etali, Primal Storm is a staple in red-inclusive Commander decks for good reason
Heres an outline: 5-8 removal spells 4-6 card draw spells (including flashback cards) 4-6 payoffs (Sahagin, Shantotto, etc.) 2-3 other creatures (Wyvern, Ice Flan, etc.) 17 lands The deck is fairly simple to put together, and really doesnt want much outside of removal, card draw, and payoffs
In that deck, Bloodghast can enable absurd amounts of card draw and ramp if it's combined with my commander and a way to untap her like Thornbite Staff
Ankle Shanker How about another aggressive Mardu creature for you