Rootha, Mercurial Artist, and Fork

Prerequisites

• Rootha, Mercurial Artist on the battlefield
• Fork in hand
• available

Steps

1. Cast an instant or sorcery spell, or wait for an opponent to cast one
2. Holding priority, cast Fork by paying , targeting the spell
3. Activate Rootha by paying and returning it to your hand, copying Fork, with the copy targeting the original Fork
4. Resolve the copy of Fork, copying Fork, targeting the original Fork
5. Repeat step 4

Results

• Infinite magecraft triggers