Sneak Attack, Great Oak Guardian, and Vedalken Mastermind

Prerequisites

• Sneak Attack on the battlefield
• Great Oak Guardian in hand
• Vedalken Mastermind on the battlefield
• Creatures you control can tap to produce at least
• Vedalkan Mastermind does not have summoning sickness

Steps

1. Activate all mana producing creatures you control by tapping them, adding at least
2. Activate Sneak Attack by paying , putting Great Oak Guardian from your hand onto the battlefield
3. Great Oak Guardian enters the battlefield, untapping all creatures you control and giving them +2/+2 until end of turn
4. Activate Vedalken Mastermind by paying and tapping it, returning Great Oak Guardian from the battlefield to your hand
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinitely large creatures until end of turn
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control
• Infinitely large creatures you control until end of turn