How can you create a combo with Overgrown Battlement, Umbral Mantle?
user
[START OF COMBO]This combo can be formed with Overgrown Battlement, Umbral Mantle

Color identity: G
Mana cost: 
Steps:
  1. Activate Overgrown Battlement by tapping it, adding at least {G}{G}{G}.
  2. Activate Overgrown Battlement by paying {3} and untapping it, giving it +2/+2 until end of turn.
  3. Repeat.
  4. If you control four or more creatures with defender, this combo nets infinite green mana.[END OF COMBO STEPS]

Result:
  - Infinitely large Overgrown Battlements until end of turn
  - Infinite green mana[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Umbral Mantle attached to Overgrown Battlement.
  - You control at least three creatures with defender.
  - Overgrown Battlement does not have summoning sickness.
[END OF COMBO PREREQUISITES]
assistant