Positioning (As this creature enters, lock your creatures in order from left to right for as long as you control a creature with positioning. Each time a creature enters or comes under your control, position it to the left or right of another creature you control.)
Adjacent creatures to the left and right of Defender of the Queue get +1/+1 and have vigilance.
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.
08-11-2024
wotc
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!).
08-11-2024
wotc
If multiple creatures enter or come under your control at the same time, position them individually.
08-11-2024
wotc
Playtest cards use a modified version of game symbols, such as {T} and {W}. These modified symbols should be treated as the standard symbols during play.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.
Marika Lord2024-08-02
