They're not meant to be taken seriously, and, honestly, you probably wouldn't want to see them at your table even if they were legal
One way is to simply sell to bots on the digital platform and turn your cards into tickets, which can then be used to participate in events or buy other products
Orvar's effect may work on any permanent, but it's best used on creatures with powerful enters-the-battlefield effects or ETB triggers
Donald Duck, Pie Slingers secondary ability is also very strong: if your opponent has 10 or more lore, this cards strength as in, the damage it can deal in challenges increases to 9
This mechanic is another one that people can check off of their wishlists, as it is something that Magic Head Designer Mark Rosewater says players have consistently requested