Havnis

Cascade
As an additional cost to cast this spell, you may
discard one card. If you do it has flash.
When Havnis is put into a graveyard from
anywhere, you may cast one Fusion from your
library or graveyard by paying its fuse cost rather
than paying its mana cost. You must pay the fuse
cost by putting cards from your graveyard on the bottom of your library including this card.