Can you use the Retreat spell on your own token to gain the ramp effect, and what happens to the token?

Ruling: Yes, you can use Retreat on your own token to gain the ramp effect. The token will return to your hand and then immediately cease to exist.

Nuances:

• The token does not get banished; it simply ceases to exist
• This means it would not trigger any hypothetical "on banish" effects