Since Omarthis comes in as big as you need, and grows even more powerful as you pump up your creatures, only to Manifest on the way out
Take for instance a card that has an "or" (modal) ability
Enchantment Color tag templates(None) Call for Unity Revolt At the beginning of your end step, if a permanent left the battlefield under your control this turn, put a unity counter on this enchantment
This includes one Commander card, one "display" version of the Commander card (foil on slightly thicker card stock), single copies of synergistic cards within your Commander's colors, and all the basic lands you need (along with an assortment of tokens)
Anyway, I really like menace on my creatures and this one is no slouch
Compared to the Charm though this card does lack innate instant speed, but still serves the same purpose for offense