Preston, the Vanisher, Felidar Guardian, and Blur

Prerequisites

• Preston, the Vanisher on the battlefield
• Felidar Guardian on the battlefield
• Blur in hand
• You have enough mana to cast Blur

Steps

1. Cast Blur by paying its mana cost, blinking Felidar Guardian
2. Felidar Guardian and Preston trigger
3. Resolve the Felidar Guardian trigger, blinking another permanent you control
4. Resolve the Preston trigger, creating a token copy of Felidar Guardian that is a 0/1 Illusion
5. When the Felidar Guardian token enters the battlefield, it triggers, blinking the nontoken Felidar Guardian
6. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite creature tokens
• Infinite landfall triggers
• Infinite blinking of permanents you control
• Infinite mana lands you control that enter the battlefield untapped can produce
• Exile any number of nonland permanents