The Tenth Doctor, Reality Strobe, Agatha of the Vile Cauldron, and Mana Crypt

Prerequisites

• The Tenth Doctor on the battlefield
• Reality Strobe in exile
• Agatha of the Vile Cauldron on the battlefield
• Mana Crypt on the battlefield

Steps

1. Cast Mana Crypt by paying its mana cost
2. Activate Mana Crypt by tapping it, adding
3. Activate The Tenth Doctor by paying at most , removing three time counters from Reality Strobe
4. Reality Strobe triggers, causing you to cast it from exile without paying its mana cost
5. Resolve Reality Strobe, returning Mana Crypt from the battlefield to your hand, and then exiling Reality Strobe with three time counters on it
6. Repeat

Results

• Infinite storm count
• Infinite magecraft triggers
• Infinite colorless mana