Agatha's Soul Cauldron + Grumgully, the Generous + Krenko, Mob Boss + Concordant Crossroads

Agatha's Soul Cauldron

Grumgully, the Generous

Krenko, Mob Boss

Concordant Crossroads

How it works

1. Activate a creature with a +1/+1 counter on it, creating a 1/1 red Goblin creature token.
2. The 1/1 Goblin token enters with a +1/+1 counter on it due to Grumgully's ability.
3. Repeat.

Agatha's Soul Cauldron serves as the engine of this combination by granting your creatures the devastating activated abilities of any creature card exiled within it. With Krenko, Mob Boss exiled under the Cauldron, any creature you control bearing a +1/+1 counter gains Krenko's formidable token-making prowess. Grumgully, the Generous ensures that every new Goblin token enters the battlefield already equipped with its own +1/+1 counter, priming them to immediately activate the ability again. Finally, Concordant Crossroads cuts away any waiting period by giving all your creatures haste, allowing the entire loop of tapping and token generation to explode into an infinite horde right away.