Yedora, Grave Gardener + Granite Witness + Skirk Alarmist + Yahenni, Undying Partisan

Yedora, Grave Gardener

Granite Witness

Skirk Alarmist

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Granite Witness.
2. When Granite Witness dies, Yedora triggers, returning Granite Witness from your graveyard to the battlefield face-down as a Forest land.
3. Resolve the Yahenni ability, causing it to gain indestructible until end of turn.
4. Activate Granite Witness by tapping it, adding .
5. Activate Skirk Alarmist by tapping it, turning Granite Witness face-up.
6. Granite Witness triggers, untapping Skirk Alarmist.
7. Repeat.