It won't turn any land into a basic land or remove the legendary supertype from a legendary land, and the lands won't be named "Island." (6/7/2024) If Harbinger of the Seas loses its abilities, it continues to turn nonbasic lands into Islands
Green: Toski, Bearer of Secrets, Shamanic Revelation, Return of the Wildspeaker, Rishkars Expertise, etc
Timey-Wimey Commanders: All of the Doctor Who precons are powerful, but Timey-Wimey is probably the best of the bunch
To note there is a solid 1-drop in Ankle Biter as well as a total of three solid common 2-drops (including Bristlepack Sentry and Voracious Varmint), making building a good curve fairly easy
The reprints are not going to get all of those cards, but why take the chance
Captain Hook, Forceful Duelist D23 Promo, 7 Initially revealed at D23 Expo, alongside other promo cards like Mickey Mouse, Brave Little Tailor and Elsa, Snow Queen, this card was also released as part of the original Lorcana set, The First Chapter