It does most of what a Fiend/Maggot does with their EtB effects and then it is better at staying in play, far better at blocking, enables raid, controls planeswalkers and is generally a pain in the arse
Channel Lightning Valley would be best suited for a Lightning-based deck that focuses on dealing consistent damage to the opposing hero and maintaining a flow of Lightning cards in the pitch zone to keep the card in play
He unabashedly loves the movie The Sword and the Stone and knew from the start that he wanted to recreate the iconic duel in Disney Lorcana TCG
And the entire hero team also has 60 life
Riverchurn Monument is the kind of mill card that scares me, because it tends to combo with a bunch of mill favorites like Bruvac, Phenax, God of Deception, and ways to make players mill a lot of cards (Maddening Cacophony, anyone?)