Creature â Hellion
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
At the beginning of each end step, if Inferno Hellion attacked or blocked this turn, its owner shuffles it into their library.
Jason A. Engle INTERVIEW
Inferno Hellionâ€™s owner shuffles it into their library only if itâ€™s on the battlefield as its last ability resolves.