If its anything like the previous two Modern Horizons sets, it should have plenty to offer for Commander players of all stripes
1 Tramp - Dapper Rascal 22/204 EN.8, Emerald Ink Currently, Amber/Emerald decks can be excellent, except they often suffer from a lack of card draw, leading to players running out of cards and suffering from a disadvantage
A zombie dwarf legend, which should tell you enough, Balthors two abilities are to strengthen minions, or bring back all red or black creatures in everyones graveyards to play
Instead of having that extra two mana threat in either Scourge of the Skyclaves or Tarmogoyf, Expressive Iteration gives Grixis some extra card advantage to find threats when it needs them, or interaction when it dont
II Exile up to two target cards from graveyards
Gatta and Luzzu will prevent damage done to Walking Ballista, and Hardened Scales will mean that any damage done to the Ballista will translate to two new +1/+1 counters instead of one