Felidar Guardian + Machine God's Effigy

Prerequisites

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Steps

1. 1Cast Machine God's Effigy by paying .
2. 2Choose to have Machine God's Effigy enter the battlefield as a copy of Felidar Guardian, except it's an artifact.
3. 3When Machine God's Effigy enters the battlefield, it triggers, blinking Felidar Guardian.
4. 4When Felidar Guardian enters the battlefield, it triggers.
5. 5Holding priority, activate Machine God's Effigy by tapping it, adding .
6. 6Resolve the Felidar Guardian trigger, blinking Machine God's Effigy.
7. 7Repeat from step 2.

Effects

• Infinite blue mana
• Infinite ETB
• Infinite LTB