Glimpse, the Unthinkable

Like most abilities on creature cards, Glimpse, the Unthinkable’s abilities only apply while it’s on the battlefield. This means that if Glimpse, the Unthinkable isn’t on the battlefield, players are free to choose its name with Meddling Mage or choose Glimpse, the Unthinkable in a player’s hand with Thoughtseize.

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!).

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.