Yidaro, Wandering Monster + Grinning Ignus + Agatha's Soul Cauldron + Cathars' Crusade

Yidaro, Wandering Monster

Grinning Ignus

Agatha's Soul Cauldron

Cathars' Crusade

How it works

1. Activate Yidaro's cycling ability by paying 1 and discarding it.
2. Yidaro triggers, putting it from your graveyard onto the battlefield.
3. When Yidaro enters the battlefield, Cathars' Crusade triggers, putting a +1/+1 counter on Yidaro.
4. Resolve the Yidaro cycling ability, causing you to draw a card.
5. Activate Yidaro using Grinning Ignus's ability by paying 1 and returning Yidaro from the battlefield to your hand, adding CC.
6. Repeat.

This ingenious loop relies on Agatha's Soul Cauldron to grant Grinning Ignus's activated ability to Yidaro, Wandering Monster, which receives a +1/+1 counter from Cathars' Crusade every time it enters the battlefield. By using the borrowed mana-generating bounce ability, you can return Yidaro to your hand while netting extra mana, then instantly cycle it right back onto the battlefield using its own built-in cycling trigger. Because Cathars' Crusade continuously empowers Yidaro upon its return, the Cauldron retains the activated ability while the entire cycle feeds your hand and mana pool indefinitely.