The Great Goblin + Mortuary + Prosper, Tome-Bound + Bloodflow Connoisseur

The Great Goblin

Mortuary

Prosper, Tome-Bound

Bloodflow Connoisseur

How it works

1. Activate Bloodflow Connoisseur by sacrificing the Goblin, Orc or Army
2. When the Goblin, Orc or Army dies, The Great Goblin's second ability and Mortuary trigger.
3. Resolve the Mortuary trigger, putting the Goblin, Orc or Army onto the top of your library from your graveyard.
4. Resolve the Great Goblin trigger, exiling the Goblin, Orc or Army from the top of your library with the ability to play it until the end of your next turn.
5. Resolve the Bloodflow Connoisseur ability
6. Cast the Goblin, Orc or Army from exile by paying its mana cost.
7. Prosper triggers, creating a Treasure token.
8. Activate the Treasure by tapping and sacrificing it, adding one mana of any color.
9. Repeat

This loop is a masterclass in recycling, turning the endless sacrifice of a creature into a self-sustaining engine. By feeding a creature to Bloodflow Connoisseur, you trigger Mortuary to place that creature right back onto your library, while The Great Goblin intercepts it on its way and banishes it to the top of your library instead with permission to cast it anew. Because you're casting that card from exile, Prosper, Tome-Bound rewards you with a Treasure token every single iteration, which you can immediately crack for the mana needed to replay your creature.