Kenrith, the Returned King + Earthcraft + Agatha of the Vile Cauldron + King Darien XLVIII

Kenrith, the Returned King

Earthcraft

Agatha of the Vile Cauldron

King Darien XLVIII

How it works

1. Activate a basic Swamp by tapping it, adding .
2. Activate Kenrith's fifth ability by paying due to Agatha, returning King Darien XLVIII from your graveyard to the battlefield.
3. Activate Earthcraft by tapping King Darien XLVIII, untapping the basic Swamp.
4. Activate King Darien XLVIII by sacrificing it.
5. Repeat.

This clever engine uses Earthcraft to turn your creatures into untap sources for your basic lands, fueling Kenrith, the Returned King's graveyard resurrection ability. Thanks to Agatha of the Vile Cauldron passively reducing the cost of creature activated abilities based on her power, Kenrith's reanimation ability becomes cheap enough to loop. You simply tap King Darien XLVIII to Earthcraft's effect, sacrifice King Darien XLVIII to trigger its protection and send it to the graveyard, and then use the generated mana to bring King Darien XLVIII right back with Kenrith.