How can you create a combo with Rootha, Mercurial Artist, Sneak Attack, Explosive Welcome?
user
[START OF COMBO]This combo can be formed with Rootha, Mercurial Artist, Sneak Attack, Explosive Welcome

Color identity: UR
Mana cost: {9}{R}
Steps:
  1. Cast Explosive Welcome by paying {7}{R}.
  2. Holding priority, activate Rootha by paying {2} and returning it from the battlefield to your hand, copying Explosive Welcome.
  3. Resolve the copy of Explosive Welcome, dealing 5 damage to any target, 3 damage to any other target and adding {R}{R}{R}.
  4. Activate Sneak Attack by paying {R}, putting Rootha from your hand onto the battlefield.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite damage
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Rootha, Mercurial Artist must be on the battlefield
  - Sneak Attack must be on the battlefield
  - Explosive Welcome must be in your hand
[END OF COMBO PREREQUISITES]
assistant