Kenrith, the Returned King + Earthcraft + Agatha of the Vile Cauldron + Sidisi, Undead Vizier

Kenrith, the Returned King

Earthcraft

Agatha of the Vile Cauldron

Sidisi, Undead Vizier

How it works

1. Activate a basic Swamp by tapping it, adding .
2. Activate Kenrith's fifth ability by paying due to Agatha, returning Sidisi from your graveyard to the battlefield.
3. When Sidisi enters, its exploit ability triggers.
4. Holding priority, activate Earthcraft by tapping Sidisi, untapping the basic Swamp.
5. Resolve the Sidisi trigger, causing you to sacrifice it.
6. Sidisi's second ability triggers, causing you to search your library for a card and put it into your hand.
7. Repeat.

This brilliant loop uses Agatha of the Vile Cauldron to drastically slash the cost of Kenrith, the Returned King's resurrection ability, reducing it to a single black mana that is easily paid by tapping a basic land through Earthcraft's enchantment ability. When Kenrith pulls Sidisi, Undead Vizier back from the graveyard, Sidisi's exploit trigger goes on the stack, allowing you to tap her to Earthcraft before she sacrifices herself—clearing the way to tutor for any card you desire while generating an endless cycle of death and resurrection.