Summoning Station + Pitiless Plunderer + Viscera Seer

Summoning Station

Pitiless Plunderer

Viscera Seer

How it works

1. Activate Summoning Station by tapping it, creating a 2/2 Pincher creature token.
2. Activate Viscera Seer by sacrificing the Pincher.
3. When the Pincher dies, Pitiless Plunderer triggers, creating a Treasure token.
4. Resolve the Viscera Seer ability.
5. Activate the Treasure by tapping and sacrificing it, adding one mana of any color.
6. Summoning Station triggers, untapping it.
7. Repeat.