Xiao, Who Wanders

Vigilance, Lifelink, First Strike, Flash
Xiao has Indestructible during your opponent's turn.
If Xiao blocks an opponent's Creature, it deals 2
damage to you for each blocked Creature.
{w}{g}{b}, Xiao may block up to three
Creatures this turn. For the rest of this turn,
you cannot gain life. You may cast this ability at any
time you would cast an Instant.