Jegantha, the Wellspring + Horde of Notions + Blasting Station + The Fire Crystal

Jegantha, the Wellspring

Horde of Notions

Blasting Station

The Fire Crystal

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Blasting Station by tapping it and sacrificing Jegantha.
3. Activate Horde of Notions by paying , causing you to cast Jegantha from your graveyard without paying its mana cost.
4. When Jegantha enters, Blasting Station triggers, untapping Blasting Station.
5. Repeat.

This ingenious loop harnesses Jegantha, the Wellspring as both the fuel and the recurring threat, tapping it for the exact five-color mana requirement needed to activate Horde of Notions' ability. Horde of Notions then fishes Jegantha straight back out of the graveyard for free, while The Fire Crystal passively grants haste so our returning beast is immediately ready to tap for mana again. Meanwhile, Blasting Station acts as both the executioner—sacrificing Jegantha to hurl a point of damage at the opponent—and the mechanical hinge whose untap trigger resets the whole engine every single time Jegantha enters the battlefield.