Magistrate's Scepterextra_turn$3.94Another artifact that can generate extra turns by accumulating counters and spending them for an extra turn. It plays a similar endgame role in colorless artifact shells, though it is slower and more mana-intensive.
Prototype PortalutilityBudget$0.84Pairs well with artifact-heavy decks by repeatedly copying a powerful artifact; while not an extra-turn card itself, it serves a similar artifact-engine role in board states built to exploit permanents like Time Sieve. It can also enable artifact token loops.
Krark-Clan Ironworksutility$15.21A sacrifice outlet for artifacts that converts them into mana, supporting the same artifact-combo play patterns as Time Sieve. It is a staple engine piece in artifact combo decks.
Grinding Stationutility$13.98An artifact sacrifice outlet that turns artifacts into self-mill and combo potential. It occupies a similar role in artifact-engine decks that want repeatable artifact sacrifice triggers.
Etherium SculptorutilityBudget$0.74A cheap artifact-affinity support piece that reduces the cost of your artifact chain, helping assemble artifact-sacrifice combos faster. It is not a direct equivalent, but it belongs in the same blue artifact combo shell.
Emry, Lurker of the Lochcard_advantageBudget$3.15A blue legend for artifact recursion that repeatedly reuses sacrificed artifacts and combo pieces. It fits the same artifact-combo gameplay and can help rebuild after using sacrifice outlets.
Thopter FoundryutilityBudget$0.42Creates artifact tokens from sacrificing artifacts, which is a very similar resource-conversion pattern to Time Sieve decks. It is one of the best enablers for artifact sacrifice loops.
Mirrodin Besiegedfinisher$10.96A blue artifact payoff that can win through artifact accumulation and graveyard pressure. In artifact-heavy strategies, it serves as a comparable inevitability engine.