This time, it wants you to be casting noncreature spells that cost four or more mana to trigger effects of various permanents
This card and the shroud of Nimble Mongoose is what sets this version of Delver ahead of the others
(It's what we in R&D refer to as a reset button.) Jokulhaups wasn't the first reset button (Alpha, after all, had cards like Balance and Nevinyrral's Disk), but I think it's become the definitive one
Take a gander at the decklists, and then we'll jump into the rankings
There are countless fun things you can do with this, and its a good job its restricted to creatures and artifacts that you control
Hall of Storm Giants (AFR-257) - Adventures in the Forgotten Realms Foil Hall of Storm Giants (AFR-257) - Adventures in the Forgotten Realms Foil Wizards of the Coast This item is like new, pulled from a sealed pack