Arixmethes, Slumbering Isle + Agatha's Soul Cauldron + Knacksaw Clique

Arixmethes, Slumbering Isle

Agatha's Soul Cauldron

Knacksaw Clique

How it works

1. Activate Knacksaw Clique using Arixmethes' ability by tapping it, adding .
2. Activate Knacksaw Clique by paying 2 and untapping it, exiling the top card of an opponent's library.
3. Repeat.

This elegant interaction turns your giant sea god into an infinite mana engine and a library-stealing machine all at once. By exiling Knacksaw Clique into Agatha's Soul Cauldron and putting a +1/+1 counter on Arixmethes, Slumbering Isle, the land gains Knacksaw Clique's untap-symbol activated ability while retaining its innate ability to tap for two mana. You can then tap Arixmethes, Slumbering Isle to add {G}{U}, use part of that mana to pay for the acquired ability's activation cost, and untap Arixmethes, Slumbering Isle to repeat the process indefinitely. Agatha's Soul Cauldron's color-fixing and counter-granting setup allows this loop to run seamlessly, letting you completely exile every opponent's library using their own stolen cards.