When Portion first came onto the scene in 2017 with “Fif’s World,” he was eulogizing a friend, and revealing an ability to transmute difficult emotions into soulful music. On I Am Nothing Without, his Warner Music Canada debut, the mood has changed considerably. “Wave,” an early single, arrives with a flurry of bombastic horns, carrying his melodic autotune to a celebration worthy of Dionysus. The rapper’s ability to turn from mournful solemnity to mirthful celebration on a dime sets him far apart from his emergent peers.