Flanking Licid

If a creature gains flanking during combat, that has no effect on any creature already blocking it. A creature needs to already have flanking before blockers are declared in order for its flanking ability to trigger.

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.

Paying {R} to end the effect is a special action and can’t be responded to.

“Creature enchantment” here means “Aura enchantment with enchant creature.”

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.

Flanking means “Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.”