Terra, Magical Adept // Esper Terra | Mirror Room // Fractured Realm

Cards

Cast
Mirror Room by paying ({2} magic symbol) ({U} magic symbol) .
When
Mirror Room enters, it triggers, creating a token copy of
Esper Terra that is a Reflection in addition to its other types. It'll enter with a lore counter on it.
Put the
Esper Terra token into your graveyard due to the legend rule.
The
Esper Terra token's first chapter ability triggers, creating a token copy of
Mirror Room.
Repeat from step 2.

This combo has been estimated to be Exhibition (Bracket 1+).