But that costs five mana and at sorcery speed and that already exists at instant speed for four mana (although in a different color combo) with Utter End so you'll need a reason to include this
Each of Apex Devastator's four cascade abilities will look for a nonland card with converted mana cost less than 10 (Apex Devastator's converted mana cost)
This is yet another reason we've drifted away from random discard as it takes away the ability to make choices
You search your library for a card, put that card into your hand, then shuffle
Luckily, the creature also has Evolve, so powering it up a bit should be fairly easy
As with many, I loved how powerful (read: broken) Vivi Ornitier was in last years Final Fantasy set, so I took a pair of spellslinger decks, mashed them together, and put together something thats all about casting as many spells as possible