Somberwald Sage + Chakram Retriever + Cavern Harpy

Prerequisites

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Steps

1. 1Activate Somberwald Sage by tapping it, adding or
2. 2Cast Cavern Harpy by paying its mana cost.
3. 3Chakram Retriever triggers, untapping Somberwald Sage.
4. 4When Cavern Harpy enters the battlefield, it triggers, returning it from the battlefield to your hand.
5. 5Repeat.

Effects

• Infinite colored mana that can only be spent to cast creature spells
• Infinite ETB
• Infinite LTB
• Infinite storm count