If you have a high-Level monster and this card on the field, you can use one "Level Eater" in your Graveyard and Summon it multiple times to swarm the field with Tokens. (Each time "Level Eater" is Summoned from the Graveyard by its effect, it is destroyed by this card leaving a Token in its place; then "Level Eater" will be sent to the Graveyard allowing it to be Summoned again, etc).
This card is extremely powerful in a "Malefic" Deck, as the Mask Tokens preserve their very high ATK but none of their negative effects.
Combine with "Malefic Truth Dragon's" effect that allows it to be Summoned from the Graveyard, so you can pay half your Life Points to get 2 Mask Tokens with no negative effects off of every Summon, one with 5000 ATK.
In a Deck spearheaded by this card, Token support cards like "Imitation", "Token Thanksgiving" or "Token Feastevil" can be very useful, mainly considering the last 2 cards affect your opponent's monster as well, which may easily get rid of your opponent's strongest monsters while inflicting damage to them or increasing your Life Points.
You could use "Owner's Seal" or "Remove Brainwashing" with this card to gain control of all the "Mask Tokens", as by game mechanics the owner of the Tokens is the owner of the card that Summoned them.