When this card is sent from the Deck to the Trash by the effect of your The Grandwalker Tsukuyomi, you can summon it without paying the cost.
This Spirit card is also treated as a Magic card.
Flash (This effect cannot be activated while on the Field) - During this turn, an opposing Spirit gets -3000 BP. If you control a Vanilla Spirit, a Spirit whose BP is brought to 0 by this effect is destroyed. After this effect resolves, you can, instead of sending it to the Trash, summon this card without paying the Cost. This effect can only be used once per turn.