Glade of the Pump Spells is played as a land. It doesn’t use the stack, it’s not a spell, it can’t be responded to, and it counts as your land play for the turn. Unlike other lands, Glade of the Pump Spells has a mana cost of {2}{G} and a mana value of 3.

You still follow all of the normal timing rules for playing a land as a special action when you play Glade of the Pump Spells. You just have to pay {2}{G} in addition to all of the other requirements as you do so.

Paying {2}{G} won’t let you play Glade of the Pump Spells if you don’t have any land drops remaining that turn.

You don’t have to pay the mana cost if a spell or ability lets you put Glade of the Pump Spells onto the battlefield, such as with the activated ability of Elvish Reclaimer.

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!).

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.

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.