mtg battle card list goes to with its first new type in 15 years Casual Decklist for battlebox :

The newly chosen Size will overwrite the original Catch of the Day's power and toughness, but the newly chosen Keyword and Whenever this creature attacks abilities will be added on top of any copied abilities

(Cue people who cut Thawing Glaciers from their cube entirely yelling at me in the comments.) Significant cards not on the list: Force of Will (!!) $70 Exile $2 Elvish Spirit Guide $4 Lim-Duls Vault $2 Shield Sphere $2 Every year for the past two years, Ive gone on the record saying that we will see a foil Force of Will within the next 6-12 months

(2019-08-23) Any enters-the-battlefield abilities of the copied creature will trigger when Wall of Stolen Identity enters the battlefield

But unfortunately, we still have to discuss it when the need arises, especially considering the card was so powerful it was banned in Modern and it's still seeing play in Legacy