Preston, the Vanisher, Fiend Hunter, Cloudshift, and Ashnod's Altar

Prerequisites

• Preston, the Vanisher on the battlefield
• Fiend Hunter on the battlefield
• Cloudshift in hand
• Ashnod's Altar on the battlefield
• available

Steps

1. Cast Cloudshift by paying , blinking Fiend Hunter
2. Fiend Hunter enters the battlefield, triggering itself and Preston
3. Resolve the Fiend Hunter trigger, choosing not to exile a creature
4. Resolve the Preston trigger, creating a token copy of Fiend Hunter that is a 0/1 white Illusion
5. The Fiend Hunter token enters the battlefield, exiling the nontoken Fiend Hunter
6. Activate Ashnod's Altar sacrificing the Fiend Hunter token, adding
7. The token dies, returning the nontoken Fiend Hunter from exile to the battlefield
8. Repeat from step 2

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers