Go-Shintai of Life's Origin, Jegantha, the Wellspring, Intruder Alarm, and Phantatog

Prerequisites

• Go-Shintai of Life's Origin on the battlefield
• Jegantha, the Wellspring on the battlefield
• Intruder Alarm on the battlefield
• Phantatog on the battlefield
• Jegantha and Go-Shintai do not have summoning sickness
• You control another nontoken Shrine

Steps

1. Activate Phantatog's first ability by sacrificing another nontoken Shrine, causing Phantatog to get +1/+1 until end of turn
2. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs
3. Activate Go-Shintai by paying and tapping it, returning any Shrine from your graveyard to the battlefield
4. When the Shrine enters the battlefield, Go-Shintai triggers, creating a 1/1 Shrine enchantment creature token
5. When the Shrine token enters the battlefield, Intruder Alarm triggers, untapping all creatures
6. Repeat

Results

• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely large Phantatog until end of turn
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of all creatures