Grub, Storied Matriarch // Grub, Notorious Auntie + Mirrorhall Mimic // Ghastly Mimicry + Agatha's Soul Cauldron + Civilized Scholar // Homicidal Brute

Grub, Storied Matriarch // Grub, Notorious Auntie

Mirrorhall Mimic // Ghastly Mimicry

Agatha's Soul Cauldron

Civilized Scholar // Homicidal Brute

How it works

1. Cast Mirrorhall Mimic by paying 3. Choose to have it enter as a copy of Grub, Storied Matriarch.
2. Put Grub, Storied Matriach into your graveyard due to the legend rule.
3. When Mirrorhall Mimic enters, it triggers, returning Grub, Storied Matriarch from your graveyard to your hand.
4. Activate Agatha's Soul Cauldron by tapping it and exiling Civilized Scholar from your graveyard, putting a +1/+1 counter on Mirrorhall Mimic.
5. Activate Mirrorhall Mimic using Civilized Scholar's ability by tapping it, causing you to draw a card and discard Grub, Storied Matriarch. Mirrorhall Mimic will then untap itself and transform, but it will transform again into Grub, Storied Matriarch.
6. Mirrorhall Mimic triggers, returning Grub, Storied Matriarch from your graveyard to your hand.
7. Repeat from step 5.