Chromatic Orrery, Flame Jab, Groundskeeper, Mana Echoes, and Polyraptor

Prerequisites

• Chromatic Orrery on the battlefield
• Flame Jab in hand or in your graveyard
• Groundskeeper on the battlefield
• Mana Echoes on the battlefield
• Polyraptor on the battlefield
• You have a basic land card in hand
• available

Steps

1. If Flame Jab is in your graveyard, cast it for its retrace cost by paying and discarding a basic land card, targeting Polyraptor
2. Otherwise, cast it by paying , targeting Polyraptor
3. Resolve Flame Jab, dealing 1 damage to Polyraptor
4. Polyraptor triggers, creating a token copy of itself
5. The Polyraptor token enters the battlefield, triggering Mana Echoes, adding for each Dinosaur you control
6. If you cast Flame Jab from your graveyard, activate Groundskeeper by paying , returning a basic land card from your graveyard to your hand
7. Repeat
8. Once you have infinite mana, you may instead target any other target using Flame Jab

Results

• Infinite colored mana
• Infinite colorless mana
• Infinite creature tokens
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite storm count