The Tenth Doctor, Reality Strobe, Agatha of the Vile Cauldron, and Grim Monolith

Prerequisites

• The Tenth Doctor on the battlefield
• Reality Strobe in exile
• Agatha of the Vile Cauldron on the battlefield
• Grim Monolith on the battlefield
• available

Steps

1. Cast Grim Monolith by paying its mana cost
2. Activate Grim Monolith 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 Grim Monolith 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