Agatha of the Vile Cauldron + Silvanus's Invoker + Keeper of Progenitus

Prerequisites

• You control a Mountain, Forest or Plains.

Steps

1. 1Activate a Mountain, Forest or Plains by tapping it, adding .
2. 2Keeper of Progenitus triggers, adding .
3. 3Activate Silvanus's Invoker by paying , 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. 4Repeat.

Effects

• Infinite mana lands you control can produce
• Infinite power and toughness for most creatures you control until end of turn
• Infinite untap of lands you control