Since the Synchro Monster's level will go down to 1 you will be able to equip it with "Opti-Camouflage Armor" or make it a target for the effect of "Baby Tiragon" to have a very powerful monster that can attack directly.
This card can be used easily to Synchro summon "Shooting Quasar Dragon" by reducing the level of a newly summon Synchro monster to 1 and then summon a Tuner Synchro monster and another Synchro monster whose combined level total equals 11. For example: "Formula Synchron" / "Puralis, the Purple Pyrotile" and a level 9 Synchro monster, "Tatsunoko" and a level 8 synchro monster etc. In addition, you now have a high level token that can easily be used for a Synchro summon and restart the combo again.
In addition, if the level switched monster is "Dark Strike Fighter", you can inflict 1400 damage to your opponent with its effect by tributing the token.