Rootha, Mercurial Artist, Mana Echoes, and Rishkar's Expertise

Prerequisites

• Rootha, Mercurial Artist on the battlefield
• Mana Echoes on the battlefield
• Rishkar's Expertise in hand
• You control at least one other Orc and/or Shaman
• available

Steps

1. Cast Rishkar's Expertise by paying
2. Holding priority, activate Rootha by paying and returning it to your hand, copying Rishkar's Expertise
3. Resolve the copy of Rishkar's Expertise, causing you to draw cards equal to the greatest power among creatures you control and casting Rootha without paying its mana cost
4. When Rootha enters the battlefield, Mana Echoes triggers, adding for each Orc and/or Shaman you control
5. Repeat from step 2
6. If you control two other Orcs and/or Shamans, this combo nets near-infinite colorless mana

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite colorless mana
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite magecraft triggers
• Near-infinite storm count