Mirrorhall Mimic // Ghastly Mimicry | Coretapper | Magistrate's Scepter

(and one other card)

All permanents on the battlefield (
Mirrorhall Mimic // Ghastly Mimicry as
Ghastly Mimicry).

At the beginning of your upkeep,
Ghastly Mimicry triggers, creating a token copy of
Coretapper.
Activate the
Coretapper token's first ability by tapping it, putting a charge counter on
Magistrate's Scepter.
Activate the
Coretapper token's second ability by sacrificing it, putting two charge counters on
Magistrate's Scepter.
Activate Magistrate Scepter by tapping it and removing three charge counters from it, taking an extra turn after this one.
If desired, activate the first ability of any untapped
Coretappers you control by tapping them, putting charge counters on any artifacts.
Repeat each turn.