Prerequisites
- Myr Galvanizer on the battlefield
 - Iron Myr on the battlefield
 - Splinter Twin on the battlefield
 
Steps
- Activate Myr Galvanizer by tapping it, creating a token copy of itself with haste
 - Activate Iron Myr by tapping it, adding 
 - Activate the Myr Galvanizer token by paying 
and tapping it, untapping each other Myr you control
 - Repeat
 
Results
Required Cards 3

Myr Galvanizer
Artifact Creature — Myr

Iron Myr
Artifact Creature — Myr

Splinter Twin
Enchantment — Aura