I wouldn't count on doubling spells with him super often, but he's a solid card even without that effect, and the times you do get a double Firebending Lesson will feel absurd
Electrostatic Field Pteramander Kaza, Roil Chaser Tezzerets Gambit Octavia, Living Thesis Guttersnipe Deep Analysis Bloodthirsty Adversary Elemental Eruption Curse of the Swine Finale of Revelation Galvanic Iteration Volcanic Torrent Many players may want to keep pingers like Electrostatic Field and Guttersnipe, but to me the whole point of Spellslinger is that you can skip out on playing these sorts of intermediate permanents
Level up was one mechanic that was identified as being a flavorful mechanic for D&D
The Flayed One gets added to a long list of 3 mana cards that self-mill, but as an artifact, is better than those other options in this deck that cares about artifacts
If you deal combat damage with this creature, you have a chance to get a massive hoard of Treasure tokens
Its a super simple commander, but I wish it had more powerful backgrounds to be paired with