Marble DiamondrampBudget$0.37A two-mana colorless mana rock that fixes into white mana, serving a similar early ramp role in white decks. It is slightly slower because it enters tapped, but it is a common budget substitute.
Mind StonerampBudget$0.31Another cheap artifact mana source that helps accelerate into higher-cost plays. It makes colorless rather than white, but fills the same early-game acceleration slot and can be cashed in later for cards.
Wayfarer's BaublerampBudget$0.69A two-mana artifact that ramps by fetching a basic land, which is a similar colorless early acceleration option. It is slower to use than Gold Myr, but very broadly playable.
Prismatic LensrampBudget$0.38A two-mana artifact that can produce mana and filter into white when needed. It plays a similar fixing role for two-mana artifact ramp, though it does not make mana immediately without an extra cost.
Guardian IdolrampBudget$0.35A two-mana mana rock that helps ramp and can later become a creature. It is colorless fixing rather than white-specific, but it occupies the same utility slot in artifact-heavy decks.
Silver MyrrampBudget$0.41This is the closest direct analogue: a 2-mana Myr that taps for white mana. It matches Gold Myr's role almost exactly, with only the artifact body differing by name and creature type.
Steel OverseerutilityBudget$0.83Also a two-mana artifact creature, it fits artifact creature decks and provides ongoing board scaling. It is not mana acceleration, but it is a similarly efficient two-drop artifact creature payoff.
Palladium MyrrampBudget$1.16A Myr mana creature that accelerates much harder than Gold Myr by producing two colorless mana. It costs one more, but it is the most obvious strict upgrade for mana production in artifact creature shells.