How can you create a combo with Rootha, Mercurial Artist, Brass's Bounty, Vedalken Orrery?
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[START OF COMBO]This combo can be formed with Rootha, Mercurial Artist, Brass's Bounty, Vedalken Orrery

Color identity: UR
Mana cost: {8}{R}
Steps:
  1. Cast Brass's Bounty by paying {6}{R}.
  2. Holding priority, activate Rootha by paying {2} and returning it to your hand, copying Brass's Bounty.
  3. Resolve the Brass's Bounty copy, creating at least six Treasure tokens.
  4. Activate five Treasure tokens by tapping and sacrificing them, adding {3}{U}{R}.
  5. Cast Rootha by paying {1}{U}{R}.
  6. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite storm count
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Rootha, Mercurial Artist must be on the battlefield
  - Brass's Bounty must be in your hand
  - Vedalken Orrery must be on the battlefield
  - You control at least six lands.
[END OF COMBO PREREQUISITES]
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