You can certainly ask opponents to not block in order to target something owned by another player if its troubling the board
Even the borderless variants hover around $2
(6/6/2025) When you proliferate, you can choose any permanent that has a counter, including ones controlled by opponents
, , Sacrifice this land: Search your library for a Forest card and a Plains card, put them onto the battlefield tapped, then shuffle
some reasonable partner commanders would be Tana, the Bloodsower and Kediss, Emberclaw Familiar for their powerful saboteur effects
March of the Machine does bring a lot of new toys for the aggressive archetype, but will it be enough to boost it to the top tiers