How can you create a combo with Metastatic Evangel, Shrieking Drake, Gemstone Array?
user
[START OF COMBO]This combo can be formed with Metastatic Evangel, Shrieking Drake, Gemstone Array

Color identity: WU
Mana cost: {U}
Steps:
  1. Cast Shrieking Drake by paying {U}.
  2. When Shrieking Drake enters the battlefield, it and Metastatic Evangel trigger.
  3. Resolve the Shrieking Drake trigger, returning it from the battlefield to your hand.
  4. Resolve the Metastatic Evangel trigger, putting a charge counter on Gemstone Array.
  5. Activate Gemstone Array's second ability by removing a charge counter from it, adding {U}.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite storm count
  - Infinite proliferate[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Metastatic Evangel must be on the battlefield
  - Shrieking Drake must be in your hand
  - Gemstone Array must be on the battlefield
  - Gemstone Array has at least one charge counter on it.
[END OF COMBO PREREQUISITES]
assistant