Bounce-caster Mage

[Birdbrain]

{snap caster Mage} + {equilibrium}. Bounce the Mage as soon as it comes into play

[MementoMori]

Equilibrium's trigger will resolve before Snapcaster hits the field. Snappy won't be a valid target.

Edit: It even says so in the Gatherer rulings.

The only way for this to work is if you trigger it off another creature and drop Snapcaster in response to the trigger.

[Double-O-Scotch]

Or just have 2 snappies