How can you create a combo with Gwenna, Eyes of Gaea, Umbral Mantle, Mana Reflection?
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[START OF COMBO]This combo can be formed with Gwenna, Eyes of Gaea, Umbral Mantle, Mana Reflection

Color identity: G
Mana cost: 
Steps:
  1. Activate Gwenna by tapping it, adding four mana of any color(s) that can only be spent to cast creature spells or activate abilities of creatures.
  2. Activate Gwenna by paying {3} and untapping it, giving itself +2/+2 until end of turn.
  3. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana that can only be spent to activate abilities of creatures
  - Infinite colored mana that can only be spent to cast creature spells
  - Infinitely large Gwenna until end of turn[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Umbral Mantle attached to Gwenna.
  - Gwenna does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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