On June 10th, 2020, Wizards of the Coast released a statement on Depictions of Racism and Cultural Insensitivity in Magic (linked above), which included the banning of the following cards from constructed play:
Efforts made to foster an inclusive environment are wholeheartedly supported by the council, and Canadian Highlander will be following suit with the bans effective immediately.
These changes have updated the Canadian Highlander banned list to include the following:
– Ante cards
– Cards depicting racism and cultural insensitivity
– Conspiracy cards
– Dexterity cards
– Silver-bordered cards
– Sub-game cards
For a detailed banned list, please reference the rules page linked here. Effectively, Canadian Highlander shares a banned list with Vintage, outside of “Lurrus the Dream-Den” remaining legal.