This card will almost always have a way to cycle away, even if its not giving you any value, but more important than the cantrip is the mega-edict you get as a followup
No matter what spell you cast with the first cascade trigger (or with any cascade triggers that result from casting that spell), the second cascade trigger will look for a spell with converted mana cost less than Maelstrom Wanderer's converted mana cost of 8
However, technically speaking, that's not the end of the story
Its definitely possible that he winds up being too explosive
Waste Not 8 Swamp 4 Fatal Push 4 Field of Ruin 4 Thoughtseize 4 Waste Not 3 Geier Reach Sanitarium 3 Castle Locthwain 3 Go Blank 3 Liliana of the Veil 3 Sheoldred, the Apocalypse 3 Sunken Citadel 2 Hive of the Eye Tyrant 2 Sheoldred's Edict 2 Bandit's Talent 2 Hostile Investigator 2 Path of Peril 2 Extinction Event 1 Urborg, Tomb of Yawgmoth 1 Demolition Field 1 Go for the Throat 1 Takenuma, Abandoned Mire 1 Duress 1 Graveyard Trespasser 2 Duress 2 Invoke Despair 2 Mazemind Tome 2 Path of Peril 2 Sheoldred's Edict 1 Pithing Needle 1 Reckoner Bankbuster 1 Graveyard Trespasser 1 Extinction Event 1 The End Waste Not is all about discard spells