During either player's turn, as Chain Link 3 or higher: You can Special Summon this card from your hand. Spell Cards that have been activated are banished instead of being sent to the Graveyard. The ATK and DEF of this card are each equal to the number of Spell Cards in your opponent's Graveyard x 500. You can only control 1 face-up "Winged Kuriboh LV9".
Stats are dependent on the number of Spell cards in your opponent's graveyard.
Special summoning condition could be difficult.
Banishes your activated Spells also.
Aside from Special summoning, you can also Tribute summon into Winged Kuriboh LV9.
Could be useful in a Burn or Mill deck because those decks are able to chain their effects almost anytime during the duel.
Since all Spell cards that are activated while this card is face-up on the field are banished. Milling your opponent's deck and hopefully sending some Spell cards to the graveyard could be the only way to increase this monster's stats.