Trazyn the Infinite, Umbral Mantle, and Five Hundred Year Diary

Prerequisites

• Trazyn the Infinite on the battlefield
• Umbral Mantle on the battlefield
• Five Hundred Year Diary in the graveyard

Steps

1. Activate Trazyn using Five Hundred Year Diary's ability by tapping it, adding at least Activate Trazyn by paying and untapping it, giving it +2/+2 until end of turn
2. Repeat

Results

• Infinite blue mana
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinitely large creature until end of turn