Rootha, Mercurial Artist, Desperate Ritual, and Through the Breach

Prerequisites

• Rootha, Mercurial Artist on the battlefield
• Desperate Ritual in hand
• Through the Breach in hand
• available

Steps

1. Cast Desperate Ritual by paying and choosing to pay and reveal Through the Breach from your hand, adding Through the Breach's effects to Desperate Ritual
2. Holding priority, activate Rootha by paying and returning it to your hand, copying Desperate Ritual
3. Resolve the copy of Desperate Ritual, adding and putting Rootha from your hand onto the battlefield
4. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite red mana