Aethersphere Harvester Aethersphere Harvester saw quite a bit of play in Standard decks, and not just in Mardu Vehicles
Tack on whichever extra mode feels right, and remember the damage-prevention mode can completely blank a red damage-based board wipe
The strategy of this deck relies upon Comfey [Lost Origin], Colresss Experiment [Lost Origin], and Lost Vacuum [Crown Zenith] to pitch cards in the Lost Zone to activate various cards
Fury and Grief proved to be so strong that they were banned in Modern, with Grief also banned in Legacy, showing just how powerful this cycle really was
And yet, these very reasons are why Krak is lower on my list then other Commander Legends creatures
(Card translated by AirglowTCG, thank you!)