How can you create a combo with Thalia and The Gitrog Monster, Royal Assassin, Thornbite Staff?
user
[START OF COMBO]This combo can be formed with Thalia and The Gitrog Monster, Royal Assassin, Thornbite Staff

Color identity: WBG
Mana cost: 
Steps:
  1. Whenever a creature enters the battlefield under an opponent's control, it enters tapped due to Thalia and the Gitrog Monster.
  2. Holding priority, activate Royal Assassin by tapping it, destroying the creature.
  3. When the creature dies, Royal Assassin triggers, untapping Royal Assassin.
  4. Repeat.[END OF COMBO STEPS]

Result:
  - Destroy all creatures that enter the battlefield under an opponent's control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Royal Assassin does not have summoning sickness.
  - Thornbite Staff attached to Royal Assassin.
[END OF COMBO PREREQUISITES]
assistant