Agatha of the Vile Cauldron + Silvanus's Invoker + Mirari's Wake

Agatha of the Vile Cauldron

Silvanus's Invoker

Mirari's Wake

How it works

1. Activate a land by tapping it, adding 1.
2. Mirari's Wake triggers, adding 1.
3. Activate Silvanus's Invoker by paying 1, untapping the land and causing it to become an 8/8 Elemental with trample and haste in addition to its other types until end of turn.
4. Repeat.

This clever loop turns Silvanus's Invoker into a one-mana untap engine by leaning on Agatha of the Vile Cauldron, whose passive cost-reduction slashes the Invoker's heavy {8} activation cost down to just a single mana. To fuel this indefinitely, Mirari's Wake steps in to double your mana production every time a land is tapped, ensuring that the single mana spent to untap the land with Silvanus's Invoker is fully refunded with interest. As you repeatedly tap and untap your lands, Mirari's Wake and Agatha of the Vile Cauldron also generously pump your entire board's power and toughness, leaving you with infinite mana and a massive army ready to trample right over the opposition.