Color Identity: B

Initial Card State
- All permanents on the battlefield.
Notable Prerequisites
- Coretapper does not have summoning sickness.
Steps
- Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter.
- Activate Coretapper's second ability by sacrificing it.
- When Coretapper dies, Shirei triggers, creating a delayed triggered ability.
- Resolve Coretapper's ability, putting two charge counters on Magistrate's Scepter.
- Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one.
- At the beginning of your end step, Shirei's delayed ability from step 3 triggers, returning Coretapper from your graveyard to the battlefield.
- Repeat each turn.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).