How can you create a combo with Adarkar Valkyrie, Intruder Alarm, Glasspool Mimic // Glasspool Shore?
user
[START OF COMBO]This combo can be formed with Adarkar Valkyrie, Intruder Alarm, Glasspool Mimic // Glasspool Shore

Color identity: WU
Mana cost: {2}{U}
Steps:
  1. Activate Adarkar Valkyrie by tapping it, targeting any legendary creature you control.
  2. Cast Glasspool Mimic by paying {2}{U}, choosing to have it enter the battlefield as a copy of the legendary creature targeted in step 1.
  3. Put the legendary creature into your graveyard due to the legend rule.
  4. Adarkar Valkyrie and Intruder Alarm trigger.
  5. Resolve the Intruder Alarm trigger, untapping all creatures.
  6. Holding priority, activate Adarkar Valkyrie by tapping it, targeting Glasspool Mimic.
  7. Resolve the Adarkar Valkyrie trigger from step 4, returning the legendary creature to the battlefield from your graveyard.
  8. Put Glasspool Mimic into your graveyard due to the legend rule.
  9. Adarkar Valkyrie and Intruder Alarm trigger.
  10. Resolve the Intruder Alarm trigger, untapping all creatures.
  11. Holding priority, activate Adarkar Valkyrie by tapping it, targeting the legendary creature.
  12. Resolve the Adarkar Valkyrie trigger from step 9, returning Glasspool Mimic to the battlefield from your graveyard as a copy of the legendary creature.
  13. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mana creatures you control can produce
  - Infinite untap of all creatures[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Adarkar Valkyrie must be on the battlefield
  - Intruder Alarm must be on the battlefield
  - Glasspool Mimic // Glasspool Shore must be in your hand
  - Adarkar Valkyrie does not have summoning sickness.
  - You control at least one legendary creature.
[END OF COMBO PREREQUISITES]
assistant