I know, think of the synergy
Playing Cursed Merfolk Ursulas Handiwork is a huge risk in a world where Steelsong has improved, and with the deck so focused on getting out to a fast start and closing things out with Chernabog, anything that can disrupt that gameplan is hugely advantaged
Mickey Mouse, Wayward Sorcerer, meanwhile, is a solid card by itself thanks to balanced strength, willpower and lore stats, but becomes even more useful when used together with the Magic Broom, Bucket Brigade cards found in the Amber and Amethyst deck, as they will cost one fewer ink to bring out and then return to your hand (instead of the discard pile) when banished while Mickey is on the field
The ability to play bigger pieces earlier is nice but the real benefit here is being able to play Philoctetes No-Nonsense Instructor and follow him up with a number of low-cost heroes in the same turn
The creature you target doesnt even need to meet the ferocious ability requirements, you just have to have one in play