Rex, Cyber-Hound + Pili-Pala + Vhal, Candlekeep Researcher

Prerequisites

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Steps

1. 1Activate Rex using Vhal's ability by tapping it, adding at least that cannot be spent to cast spells from your hand.
2. 2Activate Rex using Pili-Pala's ability by paying and untapping it, adding one mana of any color.
3. 3Repeat.

Effects

• Infinite colored mana
• Infinite colorless mana that can't be spent to cast spells from your hand