Agatha's Soul Cauldron + Neerdiv, Devious Diver + Kelpie Guide

Prerequisites

• You control another creature that does not have summoning sickness and that has a +1/+1 counter on it.
• Neerdiv has a +1/+1 counter on it.
• Neerdiv, Devious Diver does not have summoning sickness.

Steps

1. 1Activate a creature using Kelpie Guide's ability by tapping it, untapping Neerdiv.
2. 2Activate Neerdiv using Kelpie Guide's ability by tapping it.
3. 3Neerdiv triggers, causing a player to mill cards equal to its power.
4. 4Resolve the Neerdiv ability from step 2, untapping another creature.
5. 5Repeat.

Effects

• Infinite mill
• Infinite self-mill