When Breaching Hippocamp enters, it triggers, untapping Emry.
Activate Delif's Cone by tapping and sacrificing it.
Repeat.
This clever loop relies on Emry, Lurker of the Loch to continually pull Delif's Cone straight from your graveyard for free, thanks to the artifact's zero mana value. Every time you cast that artifact, Displacer Kitten triggers and blinks Breaching Hippocamp, whose entry ability immediately untaps Emry so you can repeat the process. Because you are casting a spell each iteration, this engine also juices your storm count while endlessly recycling Delif's Cone through sacrifice and battlefield triggers.