How can you create a combo with Spike Feeder, Unspeakable Symbol, Primal Vigor?
user
[START OF COMBO]This combo can be formed with Spike Feeder, Unspeakable Symbol, Primal Vigor

Color identity: BG
Mana cost: 
Steps:
  1. Activate Unspeakable Symbol by paying three life, putting two +1/+1 counters on Spike Feeder.
  2. Activate Spike Feeder's second ability twice by removing two +1/+1 counters from it, causing you to gain four life.
  3. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters
  - Infinite lifegain
  - Infinite lifegain triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have at least four life.
[END OF COMBO PREREQUISITES]
assistant