Playtest cards aren’t legal for play in any tournament format other than Mystery Booster Limited formats. On the other hand, we expect they will spice up a wide variety of non-tournament games (as long as everyone’s on the same page about using them!).
2024-11-08
Playtest cards use a modified version of game symbols, such as and . These modified symbols should be treated as the standard symbols during play.
2024-11-08
For many playtest cards, you’ll need to make a generous assumption that basic game rules would be updated to allow them to work. The Mystery Booster 2 Playtest Card Notes section (reproduced here in individual Gatherer rulings) provides guidance for fitting these cards into the existing rules structure.
Exile target creature if it has any abilities other than keywords. (Flying, protection, and partner are all keywords. See rule 702 for details. Landfall and scry aren't keywords; they're an ability word and a keyword action respectively. Yes, there's a difference.)
You can target a creature with no abilities other than keywords with TL;DR, but when TL;DR resolves, it won’t exile that creature.
Yes, a keyword action is technically also a keyword, but it’s not possible for a creature to have a keyword action without having some other ability.
and 
. These modified symbols should be treated as the standard symbols during play.