This card is effective against "Infernity" and "Stall" decks, since they are going to set all Spell/Trap Cards from their hand.
Against "Infernity" decks, you can also make them have cards in their hand. That way, they will not be handless to activate the "Infernity" card's effects.
This card was made to be used with "Goe Goe the Gallant Ninja". With this card's effect, your opponent will likely have 5 or more cards in their hand. By attacking directly, you inflict a good amount of damage and discards 2 of their cards that you just returned to their hand.
Summon this card with "Upstart Golden Ninja" to be able to instantly send 2 spell or traps to the hand. You can then Xyz Summon a Rank 4 in increased safety.