Tap an untapped nontoken artifact you control: Add .
Tap two untapped nontoken artifacts you control: Exile the top card of your library. You may play it this turn.
Flood the board with cheap nontoken artifacts, then tap them with Meria to ramp into green mana and to exile-and-play cards off the top, generating explosive card advantage in colors that normally lack it. You chain artifacts and rituals into a big payoff turn that overwhelms the table with mana and impulse draw.
Turns mana rocks and cheap artifacts into both ramp and card advantage at once
Operates in GR, giving access to artifact ramp plus the format's best ritual/explosive plays
Cheap commander (3 MV) that's hard to fully shut off without sweepers
Synergizes with untap and cost-reduction effects for huge engine turns
Heavily relies on having artifacts; targeted artifact removal and sweepers cripple her
Many activations only matter while Meria is on the battlefield, so commander removal stalls the deck
Top-of-library impulse draw can whiff on lands or uncastable cards
GR lacks counterspells and protection, leaving the engine vulnerable to disruption
Turns every permanent into an artifact, supercharging Meria's mana and exile activations.
Add untap enablers (Unwinding Clock, Voltaic Key, Clock of Omens) and mana-positive rocks to build toward infinite-mana loops, then include a clean payoff like Walking Ballista or Comet Storm. Tighten the artifact base toward cheap, mana-positive pieces and top-deck manipulation (Sensei's Divining Top, scry effects) so impulse draws never whiff. Prioritize protecting Meria with haste enablers and recursion since the deck collapses without her.