Elsa - Spirit of Winter DEEP FREEZE is game ending
This is a rather bizarre replacement effect as far as those go
Ursula - Power Hungry I've been hesitant about Ursula - Power Hungry and lore loss in general since launch
You have Madam Mim Fox who is the strongest of the Madam Mim cards to decimate your opponents board, Merlin Crab to add firepower to your units, Kit Cloudkicker who can bounce a lot of lower-powered characters, and even Peter Pan who can grant all of your Evasive characters Rush, enabling a lot of versatile plays
Now, our heroic Illumineers must infiltrate his lair and defeat his Illusions to save Lorcana
You can use it to rush opponents if you have Peter Pan on the field, draw a card when played, or quest without much danger of being taken out in a challenge due to its nice combo of Evasive with four will power